一道关于try to do和try doing用法的英语题!No body answer the front door.So he tried ____ at the back door.A.to knock B.knockC.knocked D.knocking应该选择哪个?

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一道关于try to do和try doing用法的英语题!No body answer the front door.So he tried ____ at the back door.A.to knock B.knockC.knocked D.knocking应该选择哪个?
一道关于try to do和try doing用法的英语题!
No body answer the front door.So he tried ____ at the back door.
A.to knock B.knock
C.knocked D.knocking
应该选择哪个?

一道关于try to do和try doing用法的英语题!No body answer the front door.So he tried ____ at the back door.A.to knock B.knockC.knocked D.knocking应该选择哪个?
选D,因为这个人是为了要进去才敲门的,敲门只是一种手段,try to do sth是指为了达到某目的,try doing sth是指通过尝试这个动作而达到某目的,EX：He tries speaking more English to improve his grade.=He tries to improve his grade by speaking more English.

选D
try to do 表示“努力做某事”
try doing 表示“试着做某事”
比如：
He tried to work out the problem.
他努力要解出这道题目。
Why don’t you try changing a way?
为什么你不试着改变一种方法呢？

try to do,是设法或是努力做某事
try doing尝试做某事
所以选D

D
try to do,是尽力试着做某事
try doing，是尝试做某事，不报成功希望

try to do,是尽力试着做某事
try doing，是尝试做某事，不报成功希望

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