1)It was very kind of you to do the washing-up,but you (didn't have to do) it.you didn't have是什么时态：一般过去时
2)You(should have told) me earlier.I could have helped you.为什么不是should后面跟动词原形；而told是过去式
3)English has a large vocabulary,doesn't it?
Yes.(Know) more words and expressions and you will find it easier to read and communicate.know是动词
4)When I arrived home,he(had been away) for almost one hour.过去完成时的时态
5)My father(broke)a glass while he(was cooking) the dinner for Mum's birthday yesterday.翻译：昨天爸爸在为目前生日做饭的时候打碎了一个玻璃杯.