你记住貌might似should龌would龊could这四个词,其他都好搞定.
与现在事实相反 would/should/could/might+ V原 动词过去式 did
*be 多用were 1.If I were you,I should study English.
2.I would certainly go if I had time.
与过去事实相反 would/should/could/might + have done 动词过去完成式
had done 1.If you had taken my advice,you would not have failed in the test.
2.If I had left a little earlier,I would have caught the train.
与将来事实相反 would/should/could/might + V原 ①动词过去式
②should +V原
③were + to do 1.If you came tomorrow,we would have the meeting.①
2.If it were to rain tomorrow,the meeting would be put off.③