與be busy doing sth的區別
答案是:be
busy
doing
sth
意思是:忙于做某事
比如:my
father
is
washing
the
car 爸爸正忙于刷車
be
in
沒有在各個詞組,be
with
意思是:忙于某事
always
his
work
爸爸總是在忙于他的工作
☞
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