catch doing 如何解释

高一英语吧？
是固定用法。
意思是抓住某人正在做某事。

1.表示使动意义的动词“使/让/叫某人老是不停的做。。。“
have sb. doing
make sb. doing
get sb. doing
leave sb. doing
keep sb. doing
let sb. doing

2.感官动词，表示"看到/注意到/观察到某人正在做。。。"
see sb. doing
look at sb. doing
watch sb. doing
notice sb. doing
observe sb. doing
view sb. doing
catch sb. doing ”抓住某人正在做。。。“
note sb. doing
behold sb. doing

catch sb. doing ”抓住某人正在做。。。“用被动形式就是sb. be caught doing sth.

http://zhidao.baidu.com/q?ct=17&pn=0&tn=ikaslist&rn=10&word=catch+doing&fr=wwwt