have done doing是啥啊？？

hitananda52

全句是：'You've never done much walking, have you? I don't think you could walk the five miles to our cottage!'。第一句为啥不是You've never walked so much?have done doing是咋回事？

fydy01

没有什么have done doing的结构，这里是do walking（步行）的完成式。“do+动名词”表示“做某事”，是英语中的常见用法，其他如：do reading（读书），do washing（洗衣）等。

elusty

做运动动词用do，习惯用法

entropy

两种写法都可以，注意 do . . . ing 限定词不能省略。

7 H+ m* c; r0 |We use do in the informal structure do . . . ing to talk about activities that take a certain time, or are repeated (for example jobs and hobbies). There is usually a determiner (e.g. the, my, some, much) before the -ing form.
6 `9 @/ w! z3 G- e+ A$ {
5 ^$ f: J! I# H) t! v# h# F# II'm going to do some walking . . .
% w1 o# L+ h8 x2 v1 \: C/ nI hate doing the ironing.
' S! B: O  s, J9 K* q# ^" V! N
8 P& w- M& h5 YNote the -ing form in this structure is noun-like, and cannot have an object.

NOT: I'm going to doing some watching TV.
: J$ H1 l" \+ x1 M5 E
& F8 q2 t  Y4 D5 T! HBut do can be used with a compound noun that includes verb + object.
3 D8 a$ {( y5 ]" [: x
. W) j( a* L5 f% j* R8 h& SIt's time I did some letter-writing.

( m- R1 p$ P  u# x- p来源：Practical English Usage

vzx

walking说的是exercise。

hitananda52

多谢各位老师指点