1.明天早上要早起以便赶上头班车.（may）
I 'll have to get up early tomorrow morning so that I may catch the first bus.
2.因为有了自行车你再也不必步行上学了.（need）
You needn't go to school on foot since you've got a bicycle.
3.未经允许你怎么敢进入这幢大楼呢?（dare）
How dare you enter this buildig without permission?
4.我不知道他为什么一句话也没说就走了.（why）
I don't konw why he should have left without a word.
5.生病的妈妈
diseased mother
6.我们都为推迟运动会而感到遗憾.（it,that）
We all felt it a regret that the sports meet was put off.
7.我们能够学到以前不会的东西.（what）
We can learn what we don't know before.
8.问题是校长能否同意我们的建议.（whether）
The problem is whether or not the schoolmaster will agree to our suggestion.
9.这个图书馆的藏书已增加到300万册.（increase）
The number of books in this library has increased to 3 million.
10.有时我们很难分辨他和他哥哥.（tell…from）
Sometimes it's difficult for us to tell him from his elder brother.
11.他们花了一个小时争论去哪里度假,但还是不能决定.（decide on）
We spent an hour arguing where to take the holiday without deciding on anything. 1.明天早上要早起以便赶上头班车.（may）
I 'll have to get up early tomorrow morning so that I may catch the first bus.
2.因为有了自行车你再也不必步行上学了.（need）
You needn't go to school on foot since you've got a bicycle.
3.未经允许你怎么敢进入这幢大楼呢?（dare）
How dare you enter this buildig without permission?
4.我不知道他为什么一句话也没说就走了.（why）
I don't konw why he should have left without a word.
5.生病的妈妈
diseased mother
6.我们都为推迟运动会而感到遗憾.（it,that）
We all felt it a regret that the sports meet was put off.
7.我们能够学到以前不会的东西.（what）
We can learn what we don't know before.
8.问题是校长能否同意我们的建议.（whether）
The problem is whether or not the schoolmaster will agree to our suggestion.
9.这个图书馆的藏书已增加到300万册.（increase）
The number of books in this library has increased to 3 million.
10.有时我们很难分辨他和他哥哥.（tell…from）
Sometimes it's difficult for us to tell him from his elder brother.
11.他们花了一个小时争论去哪里度假,但还是不能决定.（decide on）
We spent an hour arguing where to take the holiday without deciding on anything.