I have waited for May _____ half an hour _____ but she has not appeared _____

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I have waited for May _____ half an hour _____ but she has not appeared _____

I have waited for May _____ half an hour _____ but she has not appeared _____
I have waited for May _____ half an hour _____ but she has not appeared _____

I have waited for May _____ half an hour _____ but she has not appeared _____
I have waited for May for half an hour already,but she has not appeared yet.
这句话是现在完成式
而现在完成式有几个关键字
already - 用於肯定句
yet - 用於问句及否定句(否定句一般是在句子后面)
ever - 用於问句
never - 用於否定句(句子中间)
上面这一句句子前面是肯定句,所以用already.
后面一句是否定句,所以用yet.
时间是用at for
而这里是我等了一个半小时所以是用for
因为不是说几点!
希望可以解答你的问题!
不会可以在线交谈!

I have waited for May for half an hour already,but she has not appeared yet.
我已经等了May半个小时了,但她还没出现

for, already, yet
这是完成式,already用于肯定句,句末或sb
yet用于否定句