“some”和“any”区别

口诀:肯定句中用 some,否定疑问用 any,但若希望得肯定,问句也能用 some。

例子:I have some apples. (肯定句)
I don't have any apples. (否定句)
Do you have any apples? (一般疑问句)
Would you like some apples? (希望得到肯定回答的疑问句)


“in”“on”“at”的用法区别

口诀:时间地点各不同,“in”年“in”月“in”季节,“on”日“on”星期“on”某天,“at”点“at”节“at”年龄。

例子:I go swimming in summer. (季节用“in”)
My birthday is on Monday. (星期用“on”)
I get up at six. (具体时刻用“at”)

“there is”和“there are”的用法区别

口诀:单数不可用“is”,复数就把“are”来使。
例子:There is a pen on the desk. (单数用“is”)
There are some books on the shelf. (复数用“are”)