一般是下面的三种：He could swim when he was 3 years old.他3岁时会游泳。He was doing his homework when his father came home。.当他父亲回家时他正在做作业。I will tell you when he comes back .当他回来时我会告诉你。
用“when......？” 造句有几种句式？？列举一下！！
一般是下面的三种：
He could swim when he was 3 years old.他3岁时会游泳。
He was doing his homework when his father came home。.当他父亲回家时他正在做作业。
I will tell you when he comes back .当他回来时我会告诉你。2011-04-22
When do you.... When can I....2011-04-23
When is your birthday? 你的生日在啥时侯？2011-04-22
when do/does/did sb do sth？
when can sb do sth？
when be sb （do） sth？2011-04-22
