英语语法Asfortheoldpeoplethemselves,theyshouldnotalwaysdependonothers,butdoallthattheycantoenjoytheirtwilight.后半句that是干什么的?can后面为什么有to啊?can后面是不是有个do省略了啊？

Question

英语语法
As for the old people themselves,they should not always depend on others,but do all that they can to enjoy their twilight.
后半句that 是干什么的?can后面为什么有to啊?
can后面是不是有个do省略了啊？

Answer 1

all 后面that 引导定语从句.can 后面省略了do,因为前面已经有do了,can后面的to 是不定式作目的状语
“至于老年人他们自己,他们不应该总是依靠他人,而是要做所有力所能及的去享受他们的晚年”