accept，receive
接受、接到
accept“領受”、“接受”，表示主官方面的意願。
receive“收到”、“接到”，表動作，與主觀意願無關。
I accept a gift.(收下了)
I receive a gift.(收到了，但不一定要)
Instead, he did experiment to test and prove an idea before he was ready to accept it.
Our conutry has sent and receive TV programmes through man-made satellites.
表示”接見“、”接待“時，要用receive，不用accept。
The Vice-Chairman often receives foreign guests.
ache， pain
疼痛
ache"痛”，常指持續的隱痛。它還可以與身體某部分組成複合詞。
a headache
a teeth-ache
pain"痛”、“痛苦”，普通用語，常指突然劇痛，不含有持續疼痛的意思，也指精神上的痛苦。
A hibernating animal can not feel any pain.
across,cross,through，pass
經過、通過、穿過
across prep."橫過”、“越過”，表示從一邊到另一邊。
They built a bridge across the river.
cross vt. 與across 意思相同的動詞。
A blind man is crossing the street.
through prep. "通過“、“穿過”、“透過”，即可表示從某物中間通過，也可表示從一端到另一端。
A bullet had passed thriough his chest on the left side.
The Yellow River flows through nine provinces.
pass vi&vt "通過”、“經過”、“穿過”，既可表示從某人、某物、某地旁邊經過，也可表示空間、時間的經過。還可表示從某物內部穿過。
I was passing the cinema this morning.
After some time passed,the emperor said to himself,"I should like to know how the weavers are getting along with my cloth..."
after,behind,at the back of
在···後面
after perp.&conj. 主要指“先後之後”，是按順序說的，或是指“跟隨···之後”、“追隨···之後”，一般表動態。
After you!(客氣語，不能用behind代替）
The students went to the auditorium one after another.
The hunter was running after a hare.
after作連詞時還可以表示時間上的先後。
After only six months he had learned enough to read articles and reports in Russian.
behind prep.&adv. 主要指位置的前後，表示“在某人或某物的背後”，一般表示靜態位置。
The bike is behind the tree.
He stand up and looks behind him.
She happened to sit right hehind me.
behind 除表示位置的前後之外，還可表示時間的前後，反義詞是ahead
The train is behind its time.
at the back of phr. 表示在某物或某地後面，一般表示靜態位置。側重與緊挨著某物。反義詞是in front of。
Today at the back of the hospital,in the open air, we held a memorial meeting,at which the hospital director,a young driver and Lao Li's second son made speeches.
There was an old building at the back of the university where Pierre Curie had been working.
after,later,in
在···以後
這三個詞在表示時間的時候，都有“在···以後”的意思。
after prep. 可以表示為“在過去一段時間後”或“經過一段時間”。這時它用於過去時，不能用於將來時。after表示“在某個時刻或事件以後”時，既可用於過去時，又可用於將來時。
He stared on sunday and arrived in Bei Jing after three days.
After work I taught myself to read and write.
He will be back after four o'clock.
after 作副詞時，等於later，表示從過去算起的多少時間以後，句子的動詞只能用於過去時。
He arrived here a month after.
=He arrived here a month later.
Two years later he was elected president of the United States.
A few seconds later he was looking at the screen again with the machinery turned on.
in prep. 表示從現在算起的多少時間以後，也表示在多少時間之內。句中動詞要用將來時。
He will leave for Shanghai in a few dalys.
If you memorize a few new words every day and keep on reading all the time, in four or five years,you will certainly be able to read works in foreign languages.
