例句是If引导的条件状语从句吗?If引导的条件状语从句的时态是怎样的?这些句子是初二书上的,If you want to tunr_英语解答

例句是If引导的条件状语从句吗?If引导的条件状语从句的时态是怎样的?这些句子是初二书上的,
If you want to tunrn on the recorder,press the blue button.
If you like great music ,please welcome Sally Maxwell!
If the red right doesn't come on ,wait for thrity seconds.
If there's no green light .choose the "copy" symbol.

人气：432 ℃　时间：2020-01-28 08:44:27

解答

If引导的条件状语从句,通常从句是现在时时态,而主句则可以是情态动词引导句、祈祷句、将来时三种,按照口诀就是,主将主情主祈从现,而从例句来看,很明显,都是属于主祈从现.
主情的话,比如,If you want to go out,you must finish you homowork first.