再装语从句中,主句如果用情态动词,从句用一般现在时.例如：
You can get good grades if you study hard.恩对我就要这个，能不能再举几个例子？这个明白道理了可以随便编啊...再比如：You can't get out of the room unless your mother let you do.The farmer can find varies of mushroomswhen there is a heavy rain.P.S.回答中“状语从句”写错了，不好意思~