the first time they visit the Science MUseum,they showed gre

来源：学生作业帮编辑：大师作文网作业帮分类：英语作业时间：2024/11/18 06:10:27

the first time they visit the Science MUseum,they showed great interest to everything they saw
为什么不能用
for the first time 或者at the first time
哪些可以放句首或句尾的吗

英语中有一些表示时间的名词短语,可以用作连词,连接从句.你的例句就是一例,the first time 用来连接时间状语从句,表示“在他们第一次参观科学博物馆的时候,……”.如果前面加了介词 for 或 at,就成了介词短语,介词短语本身用作状语,就无法用作连词了.由于这样的短语可用作连词,所以一般都放在从句的句首,不会放在句尾.
在 zhangwen1890 的回答提供的几个例句中,可看出带介词 at,for,of 的介词短语,都是独立作状语的.只有“He was a school teacher the first time I saw him.（当我第一次见到他的时候,那时他是一名学校的老师.）”这个例子中,在不带介词时,用作连词,连接时间状语从句.他的译文很好地体现了这一点.

the first time they visit the Science MUseum,they showed gre _ they visited the Science Museum, they showed great interes ____they visited the Science Museum,they showed great intere This was the first time they visit还是visited Chengdu they visited (the science museum) yesterday划线提问 the foreigners ()visit the museum next week will they They want to visit the city museum对visit the city museum提问 They__(visit)the science museum yesterday they will visit the Palace Museum,if it__tommorow. They spend a lot of time____(visit)the Palace Museum. 改错 They are visit the Space Museum now. they enjoyed the visit ______the museum very much .