过去常常 be used to do 在……上花费 spend on sth
used to
词组used to“过去常常”He used to go to work by bus.他过去常常是坐公汽上班
过去常常used to do sth.习惯于 be used to
be used to do
be used tobe accustomed tobe conditioned to
used to do或would doI used to stay up till midnight.I would go to the library on Sunday when I was in college.
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绝色经典
