be easy to是容易做...
这里是主动表被动 习惯用法 be easy to后面就是主动表被动的...
另外 被动是be worked...不是be working...不适合这句...
This maths problem is easy (to work out ) 在这里不是被动用法吗?为何不用 to be working out
This maths problem is easy (to work out ) 在这里不是被动用法吗?为何不用 to be working out
英语人气：293 ℃时间：2019-11-24 08:57:59
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