.與現在事實相反的假設
條件從句 主句
一般過去時(be用were) should(would)等 +動詞原形
例如:If they were here,they would help you.如果他們在這兒,
含義:They are not here,they can’t help you.
b.與過去事實相反的假設
過去完成時 should(would)等+ have+ 過去分詞
例如:If he had come yesterday,I should / would have told him about it.如果他昨天來的話,我會把這件事告訴他的.
含義:He did not come yesterday,so I did not tell him about it.
c.表示對將來不大可能發生的事情的假想
一般過去時 should/would等 + 動詞原形
were+ 不定式
should+ 動詞原形
例如:If you succeeded,everything would be all right.如果你將來成功了,一切都會好的.
If you should succeed,everything would be all right.
If you were to succeed,everything would be all right.
含義:You are not likely to succeed,everything will be what it is now.
.與現在事實相反的假設
條件從句 主句
一般過去時(be用were) should(would)等 +動詞原形
例如:If they were here,they would help you.如果他們在這兒,
含義:They are not here,they can’t help you.
b.與過去事實相反的假設
條件從句 主句
過去完成時 should(would)等+ have+ 過去分詞
例如:If he had come yesterday,I should / would have told him about it.如果他昨天來的話,我會把這件事告訴他的.
含義:He did not come yesterday,so I did not tell him about it.
c.表示對將來不大可能發生的事情的假想
條件從句 主句
一般過去時 should/would等 + 動詞原形
were+ 不定式
should+ 動詞原形
例如:If you succeeded,everything would be all right.如果你將來成功了,一切都會好的.
If you should succeed,everything would be all right.
If you were to succeed,everything would be all right.
含義:You are not likely to succeed,everything will be what it is now.