3)常用的时间状语有:this morning, the whole morning, all day yesterday, from nine to ten last evening, when, while
4)过去进行时可以表示在过去某个时间点发生的事情。时间点可以用介词短语、副词或从句来表示。如:What was she doing at nine o'clock yesterday? 昨天晚上九点她在做什么?(介词短语表示时间点) When I saw him he was decorating his room. 当我看见他的时候他正在装饰房间。(when从句表示时间点)
3)will, shall除可表示单纯的将来时以外,还可以带有意愿的色彩,仍指的是将来。例如:I’ll buy you a bicycle for your birthday. 你过生日时,我给你买一辆自行车。(表示允诺)Will you open the door for me please? 请你帮我开门好吗?(表示请求)Shall I get your coat for you? 我可以为你拿外套吗?(表示提议)