(1) have trouble/difficulty/a hard time/a difficult time (in) doing sth. (有困难做某事)

例：People from the two countries do not have any difficulty in understanding each other.

来自那两个国家的人们在相互理解上是没有困难的。

(2) upon/on doing sth, 一……就……

例：Upon / On hearing the unexpected news, he was so surprised that he couldn't say a word.

         一听到这个出乎意料的消息，他惊讶到说不出话来。

(3) There is no/some difficulty/trouble (in) doing sth.

例：There is no difficulty in solving this social problem. 解决这个社会问题毫无困难。

(4) There is no need/use harm/hurry in doing sth

例：There is no need in sending such expensive present. 没有必要送这样贵重的礼物。

(5) spend some time/money (in) doing sth

例：They say children spend too much time chatting and playing games instead of focusing on their school work. 他们说孩子们花太多的时间在闲聊和玩游戏上，而不是集中在学习上。

(6) It's no use / good/ worth doing sth

例：It’s no use talking with him. He won’t listen to you. 跟他谈没用，他不会听你的。

(7) It's a waste of time/money/energy doing

例：It's a waste of time watching TV programme as this.