第1个回答 2012-05-25
1. 建议,命令,要求,主张,后面的从句 用should do
2. it is + adj/n. + that-从句, should do..
3. it is time + that -从句, sb. did... 或sb. should do
4. would rather +从句 sb. did... (现在,将来)或sb. had done 过去
5. 虚拟条件句: if sb. did... sb. would do. 现在
if sb. had done... sb. would have done.过去
if sb. did/ should do/ were to do.. sb. would do 将来
6. wish / as if/ if only +从句, sb. did 现在
sb. had done 过去
sb. would do 将来
主要是这6种
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第2个回答 2012-05-25
1. 建议,命令,要求,主张,后面的从句 用should do
2. it is + adj . + that+句子, should do..
3. it is time + that +句子 be----was / were , sb. did... 或sb. should do
4. would rather +句子 sb. did... (现在,将来)或sb. had done 过去
5. 虚拟条件句: if sb. did... sb. would do. 现在
if sb. had done... sb. would have done.过去
if sb. did/ should do/ were to do.. sb. would do 将来
6. wish / as if/ if only / as though +句子, sb. did / were (用于一切人称) 现在
sb. had done 过去
sb. would do 将来
7 -- - should have done sth, but 句子+ 一般过去时