If you want my
advice, I don’t think you should go. 如果你愿意听我的意见，我看你不应该去。
I don’t think
it was an accident. He did it on purpose. 我认为这不是一次意外事故，而是他有意制造的。
另外，应该注意I/ We don’t think that…结构构成反义疑问句时候，附加问句应与从句的人称和时态保持一致。如：
I don’t think
he is the right person for the job, is he? 我认为他不适合干这项工作，是吗？
2. New functions are being added to the
phones. 手机正在增加新的功能。
问：这里的add to可以用add替换吗？请解释一下add的用法。
答：这里的add to不可以用add替换。Add用作动词，意为“加；增添；接着又说；补充说”，后接名词、代词或从句；add to意为“（额外）增加；增加到”；add…to…意为“把……添加到……上”；add up to意为“总计；共达”，不能用于被动语态。如：
If you add 4 to
3, you get 7.四加三得七。
I should add
that we are very pleased. 我要补充说的是我们非常高兴。
Fireworks added
to the attraction of the festival night. 焰火使节目的夜晚更加出色。
Will you add
some sugar to your coffee? 你的咖啡要加些糖吗？
The money they
collected added up to 100,000 yuan. 他们募集到的钱总共有十万元。
3. Having a cellphone also makes us feel
safer, since we can call for help on case of an emergency. 有了手机，我们会感到更安全，因为遇到紧急情况，我们可以随时求救。
问：in case of 和 in case都表示“一旦，万一，以防”，如何区分？
答：in case of 后接名词，in case 则后接从句（该从句在特定的语境中可以省略的）。如：
In case of
rain, they can’t go. 万一下雨，他们就不能去了。
Take a hat with
you in case the sun is very hot. 带上帽子，以防天太热。
I don’t think I’ll
need any money but I’ll bring some in case. 我想我不需要钱，不过我会带些以防万一。
4. She says that her cellphone helps her do
whatever she wants to do and still stay in touch with her parents and friends. 她说手机使她想做什么就做什么，而同时又与父母和朋友随时保持联系。
问：短语stay in
touch with怎么用？
答：stay in
touch with相当于keep in
touch with,表示“与……保持联系”，侧重于指状态。如：
They stay in
touch with each other by sending emails. 他们通过发送电子邮件保持联系。
5. Now, the world is dark and dirty, with
no room for happiness and fun. 现在，世界又黑又脏，没有供幸福和娱乐的空间。
问：请解释一下room的用法。
答：句中的room作“空间，空地方”解，为不可数名词；但该词作“房间”解时，为可数名词。试比较：
There are three
rooms on the ground floor and two on the top floor. 一楼有三个房间，顶楼有两个。
There is enough
room for three on the back seat. 后面的座位能坐下三个人。
