100

He often plays baseball on weekends.

他周末常常打棒球。/ 周末他常常打棒球。
100

I sometimes chat online with friends.

我有时候和朋友上网聊天。

/ 我和朋友有时候上网聊天。

/ 有时候我和朋友上网聊天。

100

I often dance while listening to the music.

我常常一边听音乐,一边跳舞。/ 我常常听音乐的时候跳舞。

200

She swims very well, so she joins the swimming team.

她游泳游得非常好,所以她参加游泳队。

200

Older sister practices tennis every day because she has a match this Friday.

姐姐每天练习(打)网球,因为她这个星期五有比赛。
200

Though he runs very fast, he lost in the competition.

(虽然)他跑步跑得非常快,但是/可是他输了比赛。
300

I play soccer two times every week, one and a half hours each time.

我每个星期踢足球两次,每次踢一个半小时。

300

My friend plays the piano three times per week, one hour each time.

我的朋友每个星期弹钢琴三次,每次弹一个小时。

300

Little sister plays computer games once a week, half an hour each time.

妹妹每个星期玩电脑游戏一次,每次玩半小时/三十分钟。