都不用
and和or用法与区别:
1.是否定句之后通常用 or代替 and.如:He spoke loudly and clearly.他说话声间宏这且清晰.
He didn’t speak loudly or clearly.他说话声音不大且不清晰.
2.祈使句+and =if,而祈使句+or = unless.如:
Work hard,and you will succeed.(=If you work hard,you’ll succeed.) 努力工作,你就会成功.
Work hard,or you won’t succeed.(=Unless you work hard,you won’t succeed.) 努力工作,否则你就不会成功(from
www.zkenglish.com).
3.在both 之后用and,在either之后用or.如:
Both you and he are right.你和他都是对的.
Either you or he is right.不是你对就是他对.