（一）考查表示时间的介词
1）in, on, at, after
in——用于较长一段时间, 星期, 月份, 季节, 年, 朝代 世纪或非特指的早、午、晚等。
eg: in 1988, in the 21st century, in winter, in March, in the day， in the morning,
since，for常与现在完成时连用，提问时 用how long.
3)表示时间的since和from：
since表示从过去到现在的一段时间的过程，常与现在完成时连用。 from表示从时间的某一点开始，不涉及与现在的关系。
一般多与现在时、过去时、将来时连用。
I hope to do morning exercises _f_r_o_m_ today. We have not seen each other __s_in_c_e_ 1995. Since then, she ___h_a_s_w_o_r_k_e_d___ as a teacher here. From then on, she w__o_r_k_e_das a teacnd of, at this moment, at this time, at times / at a time / at one time， at the age of
【拓展考点1】
in+一段时间，表示一段时间之后，与动词将来时 连用。
after则常用于过去时。 比较：He will be back in two days.
eg. I will go(A) to the cinema(B) in(C) this
evening.
____B__去__掉_i_n____
注意：at night= in the night
at noon
at this / that time
at Christmas 区别 on Christmas Day
4)till、until
①till (until)与持续动词连用一般用于肯定句中，与短暂动词连
用一般用在否定句中。如：
他等到我12点.
He waited for me till twelve o’clock.
他直到10点才起床
He didn’t get up till (until) 10 a.m.
介词的分类与语法功能 介词是虚词，不能单独作句子成分，必须与名词、 代词（或相当于名词的其他词类、短语或从句等） 构成介词短语，表示某个人、事物/东西、事件与 另一个之间的关系。
常见的介词宾语：名词、代词、动名词、从句、
介词分为：简单介词，如at、in、for等； 合成介词，如within、inside、onto… 短语介词，如according to、out of、 because of、by means of、 双重介词，如from behind / above / under、 分词介词，如considering、including、
He came back after two days. 易错题：
--_______ will the film start?
--In ten minutes.
A. How long
B. How often
C. How soon
D. How far
【拓展考点2】 On+具体某一天/节日 易错题：--When were you born? --I was born ____ the morning of May 7th, 1995.
A. in B. at C. on D. by 常见的搭配还有
on a cold morning/on a sunny afternoon
on a hot summer night
另外注意：在时间词（morning , afternoon , evening ; Sunday…）前有last, next , this , that时，不再用介词. tomorrow, tonight前 也不用介词。
at night, at noon / on——具体某一天或具体某一个早、午、晚。
on Saturday evening, on the May seventh, on a windy night, on the afternoon, of October 31st
at——在某一点时间或某个瞬间。
但注意：在句首出现或强调句型中一般不用till而用until。如： Not until 10 a.m. did he get up.
5)in、after、later
①in + 一段时间：表示说话时为起点一段时间之后， 与一般将来时连用； 但表示“在……之内”时，用于各种时态。
②after + 一段时间表示：“在过去一段时间之后”，用于一般过去时 +一点时间时，用于各种时态。
eg. 1._in__ the morning 2._o_n_ Monday morning
3. _o_n_ a rainy evening
4. _a_t_3:50
5._in_ 2002
6._o_n_ the morning of April 10 7._i_n_ spring
8._a_t_ night 9._a_t_ this time 10. __in_ March
The doctor will be with us __i_n_ six minutes. =within We will meet again _i_n__ two weeks. He received her letter _a_ft_e_r_four weeks. He will receiver her letter _a_f_te_r_ 2 o’clock.
2)for + 一段时间常表示“持续了一段时间”, since + 时间点/ + 完成时 during则表示在……期间+ 一般时态
He has been in Beijing for 3 years.
He has been in Beijing since 3 three years ago
I was in Beijing during last summer.