The
surface feature has remained in popular culture since the image of the "Face on Mars" was known.When
this photograph was taken in 1976, many took it to be the proof that alien life existed on Mars.......Some
people thought the "Face on Mars" was the evidence that someone had landed on Mars and b...
The library ______for more than 60 years since it _____ in 1940.
A. has been open; opened
B. has been opened; opened
C. has opened; was open
D. has been open; was open
正确答案为A。但 D 为何不可以呢?有资料说,当 since 引导的状语从句的谓语动词是延续性...
原文:注意,除通常连用完成时态外,有时可用其他时态:(1) 表示时间长度时,通常用一般现在时代替现在完成时。如:It’s a long time since I met you last. 从上次见到你,已有很长时间了。It’s a fortnight since I last saw her. 我有两个星...
Had the government and scientists not worked together, AIDS-related deaths _____since their highest in 2005.这题的答案是would not have fallen,而我觉得是would not fall, 从句是对过去情况的虚拟倒装if the…scientists had not…,但主句用的是since+时间点,不应该是...
since their highest in 2005.这题的答案是would not have fallen,而我觉得是would not fall, 从句是对过去情况的虚拟倒装if the…scientists had not…,但主句用的是since+时间点,不应该是表示是从2015年到现在吗?有since的地方大都用用现在完成时,...
...院看过电影。另外,也可以将since从句中的谓语改为完成时态来加强语意而使持续性动作或状态延续到现在,但值得注意的是在since从句中用完成时态并不是很常见的。He has been looking for a job since he has been laid off.
自从他下岗以来...
请教刘老师3个问题:1、下题究竟要过去时还是完成时? -- Your name again? I'm sorry I _________(not catch) it. -- Will Smith.2、Great changes have taken place in our hometown since 2010. 有人认为此句是错误的,因为句中have take place ...