透析初中英語重難點語法：混合條件句

主句與從句的動作發(fā)生在不同的時間，這時主，從句謂語動詞的虛擬語氣形式因時間不同而不同，這叫做混合條件句。

If you had asked him yesterday, you would know what to do now.

(從句與過去事實相反，主句與現(xiàn)在事實相反。)

If it had rained last night (過去), it would be very cold today (現(xiàn)在).