时间状语从句 句型及定理答:时间状语从句 when, whenever, while, as, before, after, since, till, once, as soon as,etc.地点状语从句 where,wherever 原因状语从句 because, since, as, for, now that, etc.目的状语从句 in order that, so that, that, etc.结果状语从句 so…that, so that, such…that, that, ...