english 语法问题

来源:百度知道 编辑:UC知道 时间:2024/06/19 14:59:37
Please remain ______ until the plane has come to a complete science.
A to be seated
B seated
为什么不选A而是B?

2.
try doing sth 和try to do 的区别

3
-Come on,please give me some ideas about the project
-Sorry.With so much work_______ my mind, i almost break down.
A,filling
b, to fill
解释下原因

If Newton lived today, he would be surprise by what ___ in science .
a, has been discovered
b, had been discovered
解释下原因

-Do you have any idea what Paul does all day?
-As i know, he spends at least as much time playing as he ____.
a, write
b, does writing
c,is writing
d, does write
解释下

yet 可以用在过去完成时吗?

1、seated在这里做形容词讲,指某种状态

2、try to do 试图做某事情,还未动手
try doing 已经在尝试做某事

3、选A 介词后跟动词的ing形式

4、选b 因为假想的结果是过去的过去

5、选b 因为does等同于spends,在后面如果再用spends就重复了

yet 可以用于过去完成式与现在完成式都可以,而且还可以用于一般否定句和疑问句。