虛擬啊,就是 shoul + 動(dòng)詞原型或者是直接動(dòng)詞原型.本題是與現(xiàn)在事實(shí)相反的虛擬,即,動(dòng)詞用過去式,而be動(dòng)詞都是用were.
具體你看下：
1.辨別if 引導(dǎo)真實(shí)條件句和if引導(dǎo)的虛擬條件句的區(qū)別
If he has time,he will go with us.= Probably he has time and will go with us.
If he had time,he would go with us.=But in fact he has no time.
2.虛擬條件句中主句和從句的謂與動(dòng)詞構(gòu)成形式如下表
\x09if條件句中的謂與動(dòng)詞\x09主句的謂與動(dòng)詞
與現(xiàn)在的事實(shí)相反\x091.行為動(dòng)詞用did 形式
2.be動(dòng)詞用were\x09Should/would/could/ might + 動(dòng)詞原形
與過去的事實(shí)相反\x09had + done\x09 Should/would/could/ might + have + done
與將來的事實(shí)相反\x091.行為動(dòng)詞用did
2.should + 動(dòng)詞原形
3.were to + 動(dòng)詞原形\x09 Should/would/could/ might + 動(dòng)詞原形
希望對(duì)你有用