by accident和by mistake有什么区别

by

accident

是意外的（无主观意识，很客观的意外）

如

i

get

to

know

him

by

accident.

不能使用

i

get

to

know

him

by

mistake(因为不是犯错引起的)

by

mistake

也表示是意外的，但是更强调是无意识犯的错（带有主观色彩）

I

took

away

his

book

by

mistake.

我无意识犯错把他的书当成我的书拿走了

可以使用i

took

away

his

book

by

accident.表示我意外的拿走他的书，但是不是因为误认为是我的而拿走的。