Задание 3,Gramma in Use 7c .Spotlight, 11 класс, Английский язык,О.В. Афанасьева,ГДЗ

Надо выполнить:
Study the examples. Rewrite the sentences
omitting ‘if’.
Should you come late, we’ll stay in. (If you
come late, we’ll stay in.)
► Were you to take this course, you would get an
excellent qualification. (If you took this course,
you would get an excellent qualification.)
► Had he worked harder, he’d have met the
deadline. (If he had worked harder, he’d have
met the deadline.)
1     If you had asked me sooner, I would have been
able to come.
2     If you ordered all your books from us, we
would give you a 25% reduction.
3     If we go to the same college, we will graduate
together.
4     If my exam results come in the post, call me
straight away.
5     Will you pick me up if you finish early?