大重九99细支香烟价格:这填空题该怎做?
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(1) I _______ the key.
When did you lose it?
(2) I _______ the key.
I can't open the door.
我该用什么时态?
When did you lose it?
(2) I _______ the key.
I can't open the door.
我该用什么时态?
1 lost 过去时态
2 lose 现在时态
有DID有过去
2。现在世态
1.lost
2.am losing
lost的过去式