. in,on
1. in A B 。 :
Taiwan is in the southeast of China.
2. on A B 、 。 :
North Korea is on the east of China.
. at, in, on
1. at :
(1) 、 。 :
They came home at sunrise (at noon, at midnight, at ten o’clock, at daybreak, at dawn).
(2) 。 。 :
He went home at Christmas (at New Year, at the Spring Festival, at night).
2. in :
(1) ( 、 、 、 、 、 ) 。 :
in 2004, in March, in spring, in the morning, in the evening, etc
(2) 。 , , , “ …… ”。 :
He will arrive in two hours.
,in “ …… ”。 :
These products will be produced in a month.
:after , “ ”, “ ”。 :
He will arrive after two o’clock.
3. on :
(1) , 、 、 。 :
On Christmas Day(On May 4th), there will be a celebration.
(2) 、 。 :
He arrived at 10 o’clock on the night of the 5th.
(3) , 。 :
If the train should be on time, I should reach home before dark.
. at, in on
1. at :
(1) 。 :
I shall wait for you at the station.
(2) 。 :
He lives at 115 Zhongshan Road.
2. in :
(1) 。 :
He lives in Shanghai.
(2) , , in。 、 、 , (point) at, (place) in。 :
I met him at the post-office.
I’m now working in the post-office.
3. on , , “ …… ; …… ”。 :
The picture was hanging on the wall.
New York is on the Hudson River.