Question

be happy （about）doing sth 。。。be happy to do sth.哪个对？？

Answer 1

I am glad mother was so happy going up to bed.是对的
going up 是做伴随状语。

the children are happy _______（go）to school。
这个填to go ,短语be happy to do sth.高兴做某事。

Answer 2

be happy to do sth
Let me say, I am happy to return the compliment.
我高兴地说，我也可以用同样的赞扬来回赠中国人民。

I am very happy to have the chance to visit your trading delegation.
很高兴有机会拜访你们的交易团。

追问

I am glad mother was so happy going up to bed。。这个句子对吗

be happy （about）doing sth 。。。be happy to do sth.哪个对？？在这个句子中： the children are happy _______（go）to school

追答

to go up to bed
to go to school

追问

那么。。这个句子是错咯？？I am glad mother was so happy going up to bed。。

追答

从语法上讲没错， 前面是was happy 这里应该指一个已经完成的动作,用动名词好些。
然而，从习惯上讲，这种说法实在不多见，我不能说它错了，但我认为最好用to go up to bed