And if you become rich ,you will have a difficult time knowi

And if you become rich ,you will have a difficult time knowing who your real friends are.
这句话为什么用knowing,
takuzheng 1年前 已收到1个回答 举报

ahiqng123 幼苗

共回答了14个问题采纳率:78.6% 举报

have sth +doing 表主动语态 have sth done表被动语态

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