find sb doing sth 发现某人在做某事
succeed in doing sth成功做成某事
spend doing sth花费……做某事
keep doing sth坚持做某事
instead of doing sth代替做某事
keep on doing sth继续做某事
see sb/sth doing sth看见某人或某物正在做某事
be busy doing sth 忙着做某事
have trouble（in）
doing sth做某事有困难
love doing sth喜欢做某事
can 't stop doing sth 情不自禁做某事，
like.
如at on after 介词后面都加doing
like/love
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