Conditional sentences consist of a main clause and a conditional clause (sometimes called an if-clause). The conditional clause usually begins with if or unless. ... Type 1The main clause uses will, can, may, or might + the base form of a main verb. The if-clause uses the present simple tense.

Would have and if in a sentence?

The correct way to say this is with the past perfect in the “if” clause, and the conditional perfect in the “then” clause: Correct: If I had known that you were going to the movies, [then] I would have gone too. ... Incorrect: If I would have known that you were going to the movies, I would have gone too.

Can we use would in if clause?

Many writers wonder if it's equally correct to use “will” or “would” in an if-clause. The short answer is no, but there are exceptions to the rule.