在含有条件状语从句的复合句中,表示将来时态,主句是一般将来时态,祈使句或情态动词,if后的从句要用现在时态。 if虚拟语气的三种时态 1、提出将来会发生的事:主句:主语+would/should/might/could+动词原形; 从句:should+动词原形/were to+动词原形; 2、提出现在的条件: 主句:主语+would/should/might/could+动词原形; 从句:动词过去式; 例句:If he studied at this school, he would know the enviornment around the
school very mu