Keep on doing something也是继续做某事的意思。但是,此时表示在持续的过程中时有间断。如:
He is a famous writer. He keeps on writing every day.
他是一位著名的作家。他每天都坚持写作。
work on sth意思是“从事……工作”如:
The writer is working on a new book. The scientist is working on a new plan. We must work hard on all subjects.
这位作家正在写一部新书。科学家正在研究新计划。我们应该努力学习各门功课。
(2)give up 意思为“放弃,停止”,后面可跟动名词形式作宾语。如:
Give up smoking! It’s no good to you! 戒烟!烟对你没好处!
I can do nothing more. I have to give up.
我无能为力,只好放弃。
4. Which of these do you think is the second most useful invention?
你认为哪一个是第二有用的发明?
(1) do you think 是插入语,常置于疑问词之后,不能置于疑问词之前,作“你认为……”解释。如:
— How old do you think my father is?
— I think he’s fifty.
— 你认为我父亲多大年纪了?
— 我想有五十岁吧。
— Who do you think will teach us English this term?
— Mr Li, I think.
— 你认为这个学期谁将教我们英语?
—
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