是use sth for doing sth还是use sth doing sth

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是usesthfordoingsth还是usesthdoingsth是usesthfordoingsth还是usesthdoingsth是usesthfordoingsth还是usesthdoings

是use sth for doing sth还是use sth doing sth
是use sth for doing sth还是use sth doing sth

是use sth for doing sth还是use sth doing sth
没有use sth doing sth

介词后面+名词或者动名词

use sth for doing sth = use sth to do sth
如 We use knives for cutting things = We use knives to cut things.
没有use sth doing sth

use sth for sth
把是么当作什么

还有1. be used to do sth. “被用来做某事”
2. be used to doing sth. 习惯做某事
3. used to do sth. 过去常常做某事