31. damage, destroy, ruin
damage表示“损坏，破坏”，毁坏的程度通常是可以修补的。
The earthquake damaged several buildings.
destroy表示“破坏，摧毁，消灭，毁灭”，毁坏的程度是不能修补的。
The big fire destroyed the whole building.
ruin表示“毁灭”，把某物损坏到了不能再使用的程度。
The storm has ruined all the crops here.
32. discover, find, find out, invent,
discover表示“发现”，指偶然或经过努力发现原来客观存在但不为人所知的事物。
Columbus discovered America in 1492.
find表示“找到，发现”，着重指找到的结果。
They finally found a way to solve the problem.
find out表示“找出，发现，查明(真相等)”，指经过研究或询问查明某事或真相。
Please find out when the ship sails for Sydney.
invent表示“发明”，指通过劳动运用聪明才智发明(创造)出以前从未存在过的新事物。
Who invented the computer?
33. decide, determine
decide表示经过考虑或讨论研究做出决定。
Our boss decided not to go to Egypt by ship.
determine表示决心已下，任何力量都动摇不了。
I determined to give him a chance.
34. die away, die down, die out
die away表示“(声音，怒火等)渐渐消失”。
His anger died away. (He was not angry.)
die down表示“(声音，怒火等)逐渐减小”。
His anger died down a little bit. (He was still angry.)
die out表示“(物种等)灭绝，不复存在”。
Many living things are facing the danger of dying out.
35. everyday, every day
everyday表示“日常的，通常的；每天的”，用作形容词。
Computers are now part of everyday life.
every day表示“每天”，用作副词。
This problem we should face every day.
36. fall down, fall into, fall off, fall onto,
fall down表示“(人)跌倒，摔倒，绊倒”，不及物动词。
The old lady fell down in the street and broke her leg.
fall into表示“掉到……里，陷入(困难)”。
A car fell into the river while it is speeding on the bridge.
fall off表示“从……上落下，掉下，摔下”，用作及物动词。
The boy fell off a tree and broke the arm.
fall onto表示“掉到……上”。
The books fell off the desk onto the ground.
37. feed...on, feed...to
feed...on表示“用……喂……”，feed后接表示人或动物的词。(强调以…为主食)
I feed the dog on meat.
feed...to表示“将……喂给……”，feed后跟表示食物的词(强调“提供…”)。
What did you feed to the baby just now?
38. fear, frighten
fear表示“害怕……”。He was shaking with fear.
frighten表示“使……害怕，使……吃惊”。
Does the spider frighten you?
39. finally, at last, in the end
finally表示“最后”，指某一动作发生的顺序是在最后。
She finally agreed with me.
at last表示“终于”，指经过一番曲折或努力之后某事才发生，强调其结果。
After a lot of difficulties, he succeeded at last.
in the end表示“最后”，指经过若干周折或努力而最后发生了某事。
We did experiment after experiment, and in the end we succeed.
40. feel one’s way, fight one’s way, find one’s way
feel one’s way表示“摸索着探路”。
The blind man felt his way with the stick.
fight one’s way表示“挣扎着前进”。
All of us fought our way out of the crowd.
find one’s way表示“找到路”。
How did your dog find its way here?
41. fit, be fit for, be fit to
fit表示“适合，合身”，主要指大小适合。
Your clothes fit well.
be fit for表示“适合，能胜任”，for后面接名词或-ing形式。
You are fit for this position in our company.
be fit to表示“适合，能胜任”，to为动词不定式符号，因此后面只能接动词原形。
The food is not fit to eat.
42. forbid doing sth., forbid sb.to do sth.
forbid doing sth.表示“禁止，不许”，在无人称宾语的情况下用动名词作它的宾语。
We forbid smoking here.
forbid sb.to do sth.表示“禁止，不许”，在有人称宾语的情况下用不定式短语作其补语。
The snowstorm forbid us to go out.
43. forget, leave
forget表示“遗留”时，forget后只跟事物，不跟地点或场所。
That old lady always forgets her key.
leave表示“遗留”时，一定接地点场所。
My boss left his key at home this morning.
44. forget doing sth, forget to do sth
forget doing表示“忘记做过某事”。
He forgot turning the light off.
forget to do表示“忘记要去做某事”。
45. gather, collect
gather表示“把分散的东西集中到一起”。
Gather your toys up.
collect表示“精心地、有选择地进行收集”。
He likes collecting coins and stamps.
31. damage, destroy, ruin
damage表示“损坏，破坏”，毁坏的程度通常是可以修补的。
The earthquake damaged several buildings.
destroy表示“破坏，摧毁，消灭，毁灭”，毁坏的程度是不能修补的。
The big fire destroyed the whole building.
ruin表示“毁灭”，把某物损坏到了不能再使用的程度。
The storm has ruined all the crops here.
32. discover, find, find out, invent,
discover表示“发现”，指偶然或经过努力发现原来客观存在但不为人所知的事物。
Columbus discovered America in 1492.
find表示“找到，发现”，着重指找到的结果。
They finally found a way to solve the problem.
find out表示“找出，发现，查明(真相等)”，指经过研究或询问查明某事或真相。
Please find out when the ship sails for Sydney.
invent表示“发明”，指通过劳动运用聪明才智发明(创造)出以前从未存在过的新事物。
Who invented the computer?
33. decide, determine
decide表示经过考虑或讨论研究做出决定。
Our boss decided not to go to Egypt by ship.
determine表示决心已下，任何力量都动摇不了。
I determined to give him a chance.
34. die away, die down, die out
die away表示“(声音，怒火等)渐渐消失”。
His anger died away. (He was not angry.)
die down表示“(声音，怒火等)逐渐减小”。
His anger died down a little bit. (He was still angry.)
die out表示“(物种等)灭绝，不复存在”。
Many living things are facing the danger of dying out.
35. everyday, every day
everyday表示“日常的，通常的；每天的”，用作形容词。
Computers are now part of everyday life.
every day表示“每天”，用作副词。
This problem we should face every day.
36. fall down, fall into, fall off, fall onto,
fall down表示“(人)跌倒，摔倒，绊倒”，不及物动词。
The old lady fell down in the street and broke her leg.
fall into表示“掉到……里，陷入(困难)”。
A car fell into the river while it is speeding on the bridge.
fall off表示“从……上落下，掉下，摔下”，用作及物动词。
The boy fell off a tree and broke the arm.
fall onto表示“掉到……上”。
The books fell off the desk onto the ground.
37. feed...on, feed...to
feed...on表示“用……喂……”，feed后接表示人或动物的词。(强调以…为主食)
I feed the dog on meat.
feed...to表示“将……喂给……”，feed后跟表示食物的词(强调“提供…”)。
What did you feed to the baby just now?
38. fear, frighten
fear表示“害怕……”。He was shaking with fear.
frighten表示“使……害怕，使……吃惊”。
Does the spider frighten you?
39. finally, at last, in the end
finally表示“最后”，指某一动作发生的顺序是在最后。
She finally agreed with me.
at last表示“终于”，指经过一番曲折或努力之后某事才发生，强调其结果。
After a lot of difficulties, he succeeded at last.
in the end表示“最后”，指经过若干周折或努力而最后发生了某事。
We did experiment after experiment, and in the end we succeed.
40. feel one’s way, fight one’s way, find one’s way
feel one’s way表示“摸索着探路”。
The blind man felt his way with the stick.
fight one’s way表示“挣扎着前进”。
All of us fought our way out of the crowd.
find one’s way表示“找到路”。
How did your dog find its way here?
41. fit, be fit for, be fit to
fit表示“适合，合身”，主要指大小适合。
Your clothes fit well.
be fit for表示“适合，能胜任”，for后面接名词或-ing形式。
You are fit for this position in our company.
be fit to表示“适合，能胜任”，to为动词不定式符号，因此后面只能接动词原形。
The food is not fit to eat.
42. forbid doing sth., forbid sb.to do sth.
forbid doing sth.表示“禁止，不许”，在无人称宾语的情况下用动名词作它的宾语。
We forbid smoking here.
forbid sb.to do sth.表示“禁止，不许”，在有人称宾语的情况下用不定式短语作其补语。
The snowstorm forbid us to go out.
43. forget, leave
forget表示“遗留”时，forget后只跟事物，不跟地点或场所。
That old lady always forgets her key.
leave表示“遗留”时，一定接地点场所。
My boss left his key at home this morning.
44. forget doing sth, forget to do sth
forget doing表示“忘记做过某事”。
He forgot turning the light off.
forget to do表示“忘记要去做某事”。
45. gather, collect
gather表示“把分散的东西集中到一起”。
Gather your toys up.
collect表示“精心地、有选择地进行收集”。
He likes collecting coins and stamps.