一般现在时 sometimes,often,usually,always,every...,on Monday/...,on
weedays,in spring/...,in the morning/...,等表示现在经常发生的动作的时间词.
一般过去时 last...,...ago,yesterday等表示过去时间的短语.
一般将来时 next...,soon,in+段时间,tomorrow等表示将来的时间短语.
现在进行时 now,at the moment,right now,还有动词 look,listen,及句式,It's 6
o'clock,It's time for sth.
过去进行时 at eight o'clock yesterday,at this time yesterday,from one o'clock to
three o'clock yesterday,between one o'clock and three o'clock
yesterday,when/while 从句等表示过去的具体时间短语.
现在完成时 already,yet,ever,never,before,just.recently,these days,
in/during the past/last two years,how long 句式.
过去完成时 by the end of ...,及表示过去的从句,如,before等,主句是过去时的宾语从句.
过去将来时 主句是过去时的宾语从句中如表示将来的意思就用过去将来时.