2 years ago

well..i am not sure if i am correct about this, but i don't think "le" needs to used in this sentence because zuo tian is used. since zuo tian means yesterday, its already understood that the action has been completed. :)

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1 year, 10 months ago

不是过去式都需要用le。

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1 year, 9 months ago

cynthiayu, as you know, "le" indicates the completion of an action. In this sentence, the verb "wan" implies more like a state-being (I was in my friend's house yesterday) than a specific action. "wan" itself can cover a series of different activities, such as playing cards, dancing and eating, etc.
In this case, "le" is not used simply after the verb "wan". Hope this helps.

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