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Conditionals - if Clauses -  Type One

Type 1 - First Conditional

We use the "First Conditional" to talk about present or future events that are likely to happen. This conditional is usually based on real events, and they are used to make statements about the real world, and about particular situations. Our aim in type 1 is often to give warnings:

How to form First Conditional sentence:

Rule and Form: 

In 'first' conditional sentences, the tenses in both parts of the sentence are present or future:

  • Simple present
  • Present Perfect (have+Verb3)
  • Present Continuous Tense
  • Can
  • Should
  • to be (am, is, are)

  • will
  • can, may (permision)
  • may , might, could (posibility)
  • must, have to (obligation)
  • should, had better, ought to (advice)
  • Imperative 

Main Clause (result part)

We can use will, can, may, might, could, must, have to should and imperative forms in the main clause of a first conditional.


We usually use "will" with first conditional sentences:

  • If he's late again, I'll be very angry.
  • If he is accepted, he will be studying in Atlanta next year.
  • If they begin now, they will have finished their term paper next month.

 Can / May (permisssion)

  •  She can / may leave early if she's finished her work?

May, might, could (possibility)

  •  If the president doesn't come to the meeting, we may/ could/ might cancel it.
  • I might come and visit you in America next year if I save enough money.

must, have to (obligation)

  • You must / have to study hard if you want to pass the exam.
  • If you are late, you must take a taxi.

Should, had better, ought to (advice)

  • If you're annoyed with him, you should / ought to / had better tell him.
  • You should change subway at next station if you're going to the city center.

Imperative Mood

  • If the TV doesn't work, push this botton.
  • If you haven't decided on a vacation yet, go to Antalya.
  • Please exchange these shoes if you are going to the mall.

If Clause (condition part)

We can use Simple present ,Perfect (have+Verb3), Present Continuous Tense, Can Should  to be (am, is, are) in the if clause part of a first conditional.

Simple present Tense

We usually use "Simple Present Tense" with first conditional sentences:
  • If he doesn't hurry, he will be late.
  • If we go by train, it will be cheaper.
  • Who will you invite if you give a party?

 Present Perfect (have+Verb3)

  • If you haven't decided on a vacation yet, go to Antalya.
  • She can leave early if she's finished her work?


  •  If I can save enough money, I might come and visit you in America next year.
  •  If you can speak English, you will find jobs easily.


We use should to show that there is little possibility.

  •  If anyone should ask for me, I'll be in the manager's office.
  •  If you should ever need anything, please don't hesitate to call  me.

Present Continuous Tense 

  • If you are seeing the doctor at 10:00, you'll need to leave now.
  • If she is studying in her room now, I will be very happy.
  •  If the system is working with any problem, you may leave.

Use of a comma

When we use if clause at the the beginning of the sentence we use a comma (,) :

  • If you study hard,  you will pass the exam.

but when we use if clause at the end of the sentence we don't use a comma:

  • You will pass the exam if you study hard.

Example Sentences

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