以适当的形式填空:in summer,people always swim in _____(river).

1.the river
2.singing (try to do 的用法等同于manage to do,其中包含了试这努力做并且做成功了,如:He manage to work out the problem,翻译:他成功的做出了这道题目. try to do指试着去做某件事,成功不成功还不知道)

He is trying__to sing_____(sing)an English song.
try to do 是尽力做某事
try doing 是试着做一次
in summer,people always swim in __the river___(river).

He is trying singing an English song. (他正试唱这首英文歌曲)
In summer,people always swim in the river.（夏天人们时常在河里游泳）

第一个是river
第二个是trying to do sth.

in the river
to sing

the river
singing