几个If条件句的时态问题
1.My boy never (disturbed) me if he( noticed) that I was working.
2.He told me to read it myself if I( didn’t believe) what he (had said/said).
3.If she (is) not the kind of girl he (wants),why doesn’t he find a new one?
4.If the car (has been) badly damaged,why (don’t) you send it to the garage?
请问上述题目的空出为何要用这个时态，