verbs in time clauses and if clauses

 

Verbs in time clauses and conditionals follow the same patterns as in other clauses except:

  • In clauses with time words like when, after, until we often use the present tense forms to talk about the future:

I’ll come home when I finish work.
You must wait here until your father comes.
They are coming after they have had dinner.

  •  in conditional clauses with if or unless we often use the present tense forms to talk about the future:

We won’t be able to go out if it is raining.
If Barcelona win tomorrow they will be champions.
I will come tomorrow unless I have to look after the children.

  • We do not normally use will in clauses with if or with time words:

I’ll come home when I will finish work.
We won’t be able to go out if it will rain. rains.
It will be nice to see Peter when he will get home gets home.
You must wait here until you father will come comes.

  • but we can use will if it means a promise or offer:

I will be very happy if you will come to my party.
We should finish the job early if George will help us.


"if" clauses and hypotheses

Some clauses with if are like hypotheses so we use past tense forms to talk about the present and future.

We use the past tense forms to talk about the present in clauses with if :

  • for something that has not happened or is not happening:
He could get a new job if he really tried   =  He cannot get a job because he has not tried.
If Jack was playing they would probably win  = Jack is not playing so they will probably not win.
If I had his address I could write to him  = I do not have his address so I cannot write to him.

 We use the past tense forms to talk about the future in clauses with if:

  • for something that we believe or know will not happen:

We would go by train if it wasn’t so expensive  = We won’t go by train because it is too expensive.
 I would look after the children for you at the weekend if I was at home  = I can’t look after the children because I will not be at home.

  •  to make suggestions about what might happen:

If he came tomorrow we could borrow his car.
If we invited John, Mary would bring Angela.

When we are talking about something which did not happen in the past we use the past perfect in the if clause and a modal verb in the main clause:

If you had seen him you could have spoken to him  = You did not see him so you could not speak to him
You could have stayed with us if you had come to London  = You couldn’t stay with us because you didn’t come to London.
If we hadn’t spent all our money we could take a holiday.  = We have spent all our money so we can’t take a holiday
If I had got the job we would be living in Paris  = I did not get the job so we are not living in Paris.

 If the main clause is about the past we use a modal with have

If you had seen him you could have spoken to him.  = You did not see him so you could not speak to him.
You could have stayed with us if you had come to London.  = You couldn’t stay with us because you didn’t come to London.
If you had invited me I might have come.  = You didn’t invite me so I didn’t come.

If the main clause is about the present we use a present tense form or a modal without have:

If I had got the job we would be living in Paris now.  = I did not get the job so we are not living in Paris now.
If you had done your homework you would know the answer.  = You did not do your homework so you do not know the answer.

 

Exercise

Exercise

Comments

royaleklavya's picture

Is there any LearnEnglishteam member who can hear me? I asked a question but Nobody is anwering....
"They are coming after they have had dinner." Does it mean They are coming after having dinner... ?

AdamJK's picture
LearnEnglish
team

Hello,
We are a small team here and there isn't a guarantee of an instant response to every question. Your question is on a list to look at and we will get to it when we can.
Best wishes,
Adam
The LearnEnglish Team

royaleklavya's picture

Thanks AdamJK, thank you very much. Now I am relaxed... deep breathing. You responded me at least.

I wonder why have you not answered to my question? I mean.... you must have taken some time to write an explanatory comment so why not the answer.... 

burdado2's picture

Hello,everybody.I am new here And I just want to improve my English conversation by having meet new friends here.Could anyone help me by replying me.Thanks in advance to those people helping me here.

Weaver67's picture

Hello.
I wonder why the sentence "if you'd followed the recipe, the cake wouldn't be such a disaster" contains "wouldn't be..." in the second clause instead of "wouldn't have been...". 
As far as I can see, the sentence is a typical example of the so-called third type of conditional sentences, where the perfect infinitive should be used with the modal, isn't it?... Perhaps I got something wrong.
Thank you in advance!

AdamJK's picture
LearnEnglish
team

Hello Weaver,
Teachers talk about the 'first conditional' and the 'third conditional', but these are just ways to explain common patterns in grammar. In fact, there are many more ways to make sentences with 'if' and that's what this page is about.
The reason the speaker says 'the cake wouldn't be such a disaster' is that s/he is talking about an imaginary situation in the present. The cake is a disaster, so s/he is imagining that the cake is OK because the other person followed the recipe.
So 'wouldn't be' is the best way to express this idea. It's the same as when we say 'If you were here with me, I would be very happy.' That's also talking about an imaginary situation in the present, so 'would be' is the best choice of verb form.
Does that help?
Best wishes,
Adam
The LearnEnglish Team

royaleklavya's picture

Thanks AdamJK. That was the best way to explain 'would' form.

royaleklavya's picture

"They are coming after they have had dinner." Does it mean They are coming after having dinner... ?

Stephen Jones's picture
LearnEnglish
team

Hi royaleklavya,
 
I would say that they both mean the same, although the second one sounds more like it would be used when speaking or in less formal situations.
 
Regards,
 
Stephen Jones
The LearnEnglish Team

royaleklavya's picture

Thanks Stephen Jones. Now this time I think I got it.
HAVE can be used as a main verb form and its second and third form, is had. So it is used as HAVE HAD HAD...