4. 表示“一.....就”的时间连词,主要有as soon as,the moment, the minute, the second, the instant, immediately, directly, instantly, once, no sooner...than, hardly...when等
5. 表示“上次”“下次”“每次”等的时间连词,主要有every time,each time,(the)next time,any time,(the)last time,the first time