loading介词、连词
介词 (3.1) on,in,at表示时间
（1）on+星期 on Monday on+日期 on May 1st on+周末 on the weekend
On+具体某天的早中晚 on Saturday morning
(2)in+年份 in 2008 in+月份 in January in+季节 in Spring in+早中晚in the morning
(3)at+时刻 at 2 o’clock at+中午 at noon
(3.2)on,over,under,in,behind,near,beside表示方位
on在…上面（两物体接触） over在…下面（两物体不接触） under在…下面
in在…里面 behind在…之后 near在…附近 beside在…旁边 （3.3）at与in表示地点。
at在…(小地方) at school in在…(大地方)in China 连词 and和，还有 or还是，或者 but但是 when/while 当…时
before在…之前 after在…之后 because因为 so所以 if如果
选择填空：
（ ）1.The bus arrived____9:45am. A.on B.at C.in
（ ）2.Her father is a teacher___that school. A.at B.in C.on
( )3.There is not any water___that bottle A.in B.at C.to
( )4.It’s 4:20____Wednesday afternoon. A. in B.on C.at
( )5.Don’t write.Look___the blackboard.
A.at B.with C.in
( )6.Are there any birds___the tree? A.at B.on C.in
( )7.The cats are____the table. A. under B.in C.of ( )8.John is talking____Mary A.in B.at C.with
( )9.What can you do___your legs ? A.of B.in C.with
( )10.Is your bicycle___the house? A.in front B.at C.to
( )11.Our school is___a big supermarket. A.on B.under C.near ( )12. My birthday is __April. A.in B.on C.at
( )13. I usually play football___the weekend. A.on B.at C.in
( )14.Please wait__me at the bus stop. A.at B.for C.to