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

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