Question

求介词round,of,on,since,off,out of ,outside,over

Answer 1

ound与around 意思接近

作介词用的around与round通常可以互换,只不过美语常用around,而英语常用round,例如：You can see the post office round/around that corner.(绕过那个弯你就可以看到邮局.但是一定要区别它们的不同之处：round可以用作形容词、副词、介词、动词、名词；而around只能用作副词或介词.

of 以为“的”通常表达所属,表达属于某人的东西用's而不用of,如Peter's cat.而表达动物或无生命所属的东西用of较多,如the ear of the cat,the branch of the tree.有时表达的短语较长时,通常用of.其次就是of的固定搭配了,需要记忆,如take care of ,on behalf of等.

since 表示“自从”,后面跟时间点或者表示时间点的句子.例如,Mary has lived in Shanghai since 1990.Mary has never swum since she fell into a river at the age of 5.

out of 跟动词搭配比较多.run out of 表示“耗尽,用完”,如i've run out of money.get out of 表示“出去”,如Get out of the room now !

outside 意为在外面.she is outside.He is running outside.

over 要跟具体搭配才能理解意义.如go over the lessons表示复习功课；think over考虑；turn over 翻过；over there 在那边.

总之一句话,英语的单词,要放在句子才能分析理解,其用法多样,无法穷尽.