1)Personally, I feel it amazing the unbeatable former world champion should have lost the women's badminton single in Doha Asian Games．

2)Oh, It's 9 o'clock, he should be home now anyway．

3)I should advise you to pay more attention to state affairs．

4)I really don't know why you should think that I did it．

5)I should pay Tracy a visit, but I am not sure whether I will have time this Sunday．

归纳：1)表示委婉的陈述自己的意见。　　如：句________。

2)意外或惊异，“竟然”。　　　　　　　　如：句________。

3)表示推测“按说应该”。　　　　　　　　如：句________。

4)表示“义务”，“应该”。　　　　　　　　如：句________。

________多用于句首，主句用________语序。

if only多用于________语气中，表示愿望。

用if only或only if完成句子。

________ the red light comes on is there any danger to employees．

用if only或only if完成句子。

________ a teacher has given permission is a student allowed to enter the room．

用if only或only if完成句子。

________ I could swim．

用if only或only if完成句子。

________ he had remembered to buy some fruit．

用适当的情态动词填空。

肯定句中“可能”用________，疑问句中“可能”用________。“可能不”________，“不可能”________，“不允许”________。

用适当的情态动词填空。

Tom won the first place, ________ it be true?

用适当的情态动词填空。

John, you ________ not play the knife, you ________ hurt yourself．