TPO中的问题

1.a lot of people still thought tomatoes are poisonous. 我想请问为什么从句用现在时
2.The books have to been in perfect condition of course. They can be marked up or looked use in any way for the full refund.求翻译，重点是marked up 何解
3.So I’d like to know if you be willing to join us as the student's representatives. 从句中为什么是be呢？

1，时态一致的例外：如果宾语从句表示一般真理或习惯性行为，则不必与主句时态一致，用一般现在时即可。
.google  иI knew that Beijing is the capital of China before I was in primary school.
当然，也可以用过去时，都行。
I knew that Beijing was the capital of China before I was in primary school.
. 1point 3acres
2，你听错了。
They can't be marked up or looked used in any way.
它们不能被划过线，或者看起来被使用过。


3，你听错了。
I'd like to know if you'd be willing to join us as a student representative.
我想知道你会不会作为学生代表加入我们。


楼主啊，以后提问能不能把来源说清楚啊？我花了半个小时终于找到了这两套 TPO 和它们的音频，听过以后才发现你提的问题根本就不存在。

birdor 发表于 2013-9-28 19:03
. Χ1，时态一致的例外：如果宾语从句表示一般真理或习惯性行为，则不必与主句时态一致，用一般现在时即可。
I ...

真心感谢你啦！！下次一定会注意这个问题的，把提问写清楚。你这么好的人14年一定会offer拿到手软的，真的真的谢谢你！