各个时态的标志词
一般现在时 sometimes, often, usually, always, every..., on Monday/..., on
weekdays,in spring/...,in the morning/...,等表示现在经常发生的动作的.时间词。It seldom snows here.
He is always ready to help others.
Action speaks louder than words.
一般过去时 last..., , yesterday等表示过去时间的短语。They are going to have a competition with us in studies. It is going to rain.
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。As soon as we got to the station, the train had left. By the end of last month， We had reviewed four books
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。He said he would go to Beijing the next day. I asked who was going there