对于介词你了解多少？
in , on, at
最近我们会介绍一系列语法小知识， 同学们虽然对基础语法有一定的了解， 但是大多都反映如果可以系统详细的学习语法知识的细节， 会更有帮助， 今天我们从介词开始为大家介绍。：）
We use at for the time of day
例如：
at five o’clock， at 11.45， at midnight， at lunchtime， at sunset etc.
We use on for days and dates
例如：
on Friday / on Fridays, on 16 May 1999 , on Christmas Day , on my birthday
We use in for longer periods (for example: manths/years/seasons)
例如：
in October, in 1988, in the 18th century, in the past, in (the) winter , in the 1990s , in the Middle Ages , in (the) future
01
At
at night - I don't like going out at night.
at the weekend / at weekends - Will you be here at the weekend?
at Christmas - Do you give each other presents at Christmas?
at the moment / at present - Mr Benn is busy at the moment / at present.
at the same time - Emily and I arrived at the same time.02
对比
In & On
We say:
in the morning(s)
in the aftenoon(s)
in the evening(s)
but
on Friday mornings)
on Sunday afternoons)
on Monday evenings) etc.
We do not use at/on/in before last/next/this/every:
I’ll see you next Friday. (not on next Friday)
They got married last March.
In spoken English we often leave out on before days (Sunday/Monday etc.).
So you can say:
I’ll see you on Friday, or I’ll see you Friday.
I don’t go out on Monday mornings, or I don’t go out Monday mornings.
