Building negative sentences

So you’ve mastered the tenses, you know the difference between the present simple, perfect and continuous, but negative sentences are still difficult? When do we use an extra helping verb and when can just add not? Here is a brief guide to building negative sentences in English.

Present simple

When we form negative sentences in the present and past simple, we need a helping verb as well as the word not followed by the main verb. In the present, we use do or does:

I do not like chocolate. / I don’t like chocolate.

He does not like chocolate. / He doesn’t like chocolate.

do(es) + not + base form of main verb (no -s, -ing or to)

As we can see from these examples, we can shorten do not or does not to don’t or doesn’t. We do this a lot when we speak or write informally.

It’s not important what the main verb is, we nearly always need the helping verb to make a negative sentence. Sometimes we can have the verb do twice in once sentence, once as the helping verb and once as the main verb:

She does not do her homework. / She doesn’t do her homework.

This rule also applies to the verb have:

We do not have time. / We don’t have time.

Past simple

It’s the same with the past simple too, but this time we use did not or the short form didn’t:

I did not go to the meeting. / I didn’t go to the meeting.

We did not do the work. / We didn’t do the work.

He did not eat at home. / He didn’t eat at home.

did + not + base form of main verb (no -s, -ing, -ed or to)

The helping verb stays the same here; we don’t need to change it for he/she/it. Another important point to remember is that we don’t need to put the main verb in the past. The did is enough to show we’re talking about the past.

Exceptions

The only time we don’t need a helping verb with the simple tenses are with the verb be or modal verbs (e.g. can, must, should, might, may, will, shall, etc).

I am not at school. / I’m not at school.

He was not in Spain. / He wasn’t in Spain.

We must not open the door. / We mustn’t open the door.

They cannot pass the test. / They can’t pass the test.

She should not drive. / She shouldn’t drive.

Here, we simply add not after be or the modal verb.

Present continuous

Because we already have a helping verb in the sentence, we just add not between the helping verb and the main verb:

I am not going to the party. / I‘m not going to the party.

We are not giving the presentation. / We‘re not giving the presentation.

He is not learning Japanese. / He‘s not learning Japanese.

Other past tenses

Similarly in other past tenses, we already have a helping verb in the sentence (a form of either have or be). This means we just add not after the helping verb and we’re good to go.

We have not been to the cinema. / We haven’t been to the cinema.

I was not talking to my friend. / I wasn’t talking to my friend.

He had not visited Greece before. / He hadn’t visited Greece before.

Future tenses

When we use the helping verb will, we also just add not to the sentence:

I will not go the conference. / I won’t go the conference.

It will not rain tomorrow. / It won’t rain tomorrow.

Summary

The general rule is that if we already have a helping verb in a sentence, we just add not after the helping verb to make a sentence negative. If there is no helping verb (like in the present or past simple), we need to add one (e.g. do or did). There are, however, some exceptions, such as with the verb be or modal verbs.


Do you have other helpful tips for building negative sentences? Or do you have more questions? Feel free to post them in the comments below.

Five common mistakes when learning English

Learning a language is not always easy. There are new words to learn, grammar structures to master and different situations to practise using our new skills. Everyone makes mistakes sometimes when speaking a new language; it’s part of the learning process. I’ve collected five common mistakes when learning English and some tips on how to correct them.

1. If + will/would

If sentences can be confusing. There are lots of different types of if sentences and we can even mix them. However, one important rule is that will or would do not go in the same part of the sentence as if. They do not like each other! Here are some examples:

If I will see her, I will tell her.
If I see her, I will tell her.

If I would get the job, I would be very happy.

If I got the job, I would be very happy.

2. Double past tense

When we make negative sentences or questions in the past tense, we normally use the helping verb did or didn’t. This verb shows we are talking about the past. That means we don’t add -ed or use the past form of the main verb. For example:

I didn’t went to the show.
I didn’t go to the show.

Did you saw the email?
Did you see the email?

More tips on building negative sentences.

3. When to use present perfect

There are several rules that help us to decide if we need present perfect or simple past. Probably the most important one is that we cannot use present perfect with time words that show that something is finished, such as:

  • yesterday
  • last week
  • last month
  • on Tuesday
  • in October
  • in 2017
  • in the morning

Have you gone to the gym yesterday?
Did you go to the gym yesterday?

Has she called the client last week?
Did she call the client last week?

I’ve written on more tips on using the present perfect and past simple here.

4. Negative modal verbs

Modal verbs are special helping verbs. When we make a negative sentence with a modal verb (can, must, may, should, must, might, etc) we do not use don’t. Instead, we just add not after the modal verb.

I don’t can speak Spanish.
I can’t speak Spanish.

You don’t should wear your hat inside.
You shouldn’t wear your hat inside.

Must has special rules!

We don’t must finish the presentation today.
We don’t have to finish the presentation today.
(We can, but it’s not necessary.)

Note: We mustn’t smoke in the office.
(It is forbidden.)

5. Present simple or continuous?

This is a common mistake for both beginners and advanced learners. If an action is repeated, we use simple present. If an action is right now or for a short time around now, we use present continuous.

Every day I’m starting work at 8am.
Every day I start work at 8am.

At the moment I learn Russian.
At the moment I’m learning Russian.

More tips about present tenses can be found here.


Do you have any other tips to help with these topics? What do you find most difficult in English?

Present simple or present continuous?

English is famous for having lots of tenses to choose from. The first tenses to learn are the present tenses, talking about now. In English, we have different ways of thinking about what ‘now’ means. In this post, I’ve explained some of the main differences between the present simple and present continuous and when to use these tenses.

Form

Let’s take a look at the form of these tenses first.

The present simple is constructed like this:

I work. – I don’t work. – Do you work?

She works. – She doesn’t work. – Does she work?

When we form negative sentences and questions, we use the helping verb do. When we talk about he/she/it, we add an ‘s’ to the main verb (or helping verb in negative sentences and questions).

The present continuous is constructed like this:

I am working. – I am not working. – Are you working?

She is working. – She is not working. – Is she working?

In these sentences, we always need the helping verb be and the ing form of the main verb.

Facts

When we talk about facts and things that are always true, we use the present simple. For example:

Water boils at 100 degrees.

The town is 20 miles from the coast.

He has dark hair.

Routine

When we talk about routines and repeated actions, we use the present simple. There are some signal words that show this, including often, usually, sometimes, rarely, never, every day, once a year, etc. If we answer the question “How often….?” we use also the present simple.

I leave the house at 7 am every morning.

We go to the cinema once a month.

He usually has meetings on Tuesdays.

The company closes over Christmas every year.

Actions right now

When we talk about actions taking place at this moment, we use the present continuous. Signal words for this include right now, at the moment, at this minute, today, this morning, just, etc. For example:

I’m doing my homework.

Right now I’m finishing the report.

At the moment I’m trying to call the hotline.

Today we’re discussing the budget.

Actions around now

We also use the present continuous for actions around now. This means something might not be happening at this moment, but it is a temporary situation still ongoing. For example:

I’m learning Spanish.

We’re working on the new project.

She’s staying with a friend for a month.

Changes

To describe changes taking place now, we use the present continuous. For example:

Our customers are using our online chat more often.

More people are cycling to work.

Young people are becoming more interested in politics.

Future plans

We can also use the present continuous to describe future plans that are set and have been planned, often with someone else. For example:

I’m going on holiday in June.

We’re visiting our sister at the weekend.

They’re going out for lunch tomorrow.

Summary

As a general rule, it could be helpful to remember that if something only happens once or for a short time, we use the present continuous, and if it happens more than once, we use the present simple.


Extra practice
Make a short list of verbs from your course. For each verb, say
and then write two sentences with that verb, one in the present
simple and one in the present continuous. For example: 'work' -->
'I work from nine to five every day.' / 'I am working on an 
important project at the moment.' 

Do you have any more tips and tricks to remember which tense to use?