clauses of time(时间状语从句)

引导时间状语从句的连词或起连词作用的词语非常多,主要有:

before, after, as, since, once, till (until), when, whenever, as long as, as soon as, now (that), the minute (moment, instant, second), by the time (that), every time, next time, directly, immediately 以及关联从属连词 hardly... when, no sooner... than 等等(见相应的条目)。