一般现在时：We run every morning.
一般过去时：I got up at 6:00 yesterday.
现在进行时：Look,they are dancing.
Listen,she is singing.
I am playing basketball now.
过去进行时：She was watching TV at7:30 yesterday.
现在完成时：I have learned English for 2 years.
过去完成时：He had rembered 1000 words by the time of last term.