English grammar: if and would

If and would - isn't good!!!

A very common error is hearing someone say for example

If I would buy a car ...

If I would go to England ...

You should generally use the conditional form:

If I bought a car ...

If I went to England ...

Further examples:

If I saw

If I needed

If I came

. . .

There are some other, less common, constructions of similar meaning.

So-called "should/would" clauses:

If I should die before I deliver this, my brother would surely then deliver it to you.

Contrary to fact conditionals:

If I were a bird, I would fly right over there.