Correct the mistakes.

1 You'd not better be late for your interview.
2 We would better go soon.
3
It's high time you tidy your bedroom.
4 We'd better to do the washing-up.
5 I'd rather the guests come at eight o'clock.
6
Unless you don't study, you won't pass the exams.
I wish we would afford a new car.
7
8
If you will need any help. just call me.