F
001
fall apart（情感上）崩溃；散开；状态恶化
重点解析 ▲该词组中apart作副词，意为“分离，分开，相隔”, fall apart表示“崩溃；散开；状态恶化”。
情景对话
Linda: The old books easily fall apart. Be careful when you use it.
Mark: I will.
琳达：这些旧书很容易散开。用的时候小心一点。
马克：我会的。
触类旁通
· break down（讨论、关系或系统）失败，发生故障 · go to pieces 瓦解；垮掉；破碎
例句再现
It's very painful to see everything one has worked for fall apart.
看到所谋求的事都失败了，十分痛心。
His career began to fall apart after that incident． 经过那次事件，他的职业生涯开始走下坡路。
They saw the building start to fall apart． 他们看到建筑开始倒塌。
Many people fall apart due to overwork． 许多人的身体因为过度劳累而垮了。
She tried not to fall apart when going through difficulties． 经历困难时，她努力不使自己崩溃。
002
fall asleep 入睡，睡着
重点解析 ▲ fall在此处指“成为，变为”，后加形容词，表示“进入……状态”。asleep作形容词，意为“睡着的，熟睡的”。短语fall asleep指“入睡，睡着”。
情景对话
Kate: I was so tired yesterday that I fell asleep the minute my head hit the pillow. Lucy: Same here.
凯特：昨天我太累了，头一碰到枕头就睡着了。
露西：我也是。
触类旁通
· drop asleep 入睡
· fall asleep doing 做……时睡着
例句再现
It takes a long time for her to fall asleep． 她要花很长时间才能入睡。
She couldn't fall asleep with the noise going on outside． 外面噪音不断，她无法入睡。
He has fallen asleep when she comes back． 她回来时，他已经睡着了。
The baby falls asleep in her arms． 婴儿在她怀里睡着了。
I left when she fell asleep． 她睡着时我离开了。
003
fall down 跌倒；倒塌
重点解析 ▲ fall在此处指“降落，落下，倒下”, down作副词，表示“向下，在下面”。短语fall down意为“跌倒；倒塌”。
情景对话
Jenny: Careful! Don't let the basket fall down.
Linda: OK. Don't worry.
珍妮：小心！不要摔坏篮子。
琳达：好的。别担心。
触类旁通
· fall over oneself （因匆忙、动作不灵而）摔倒；特别卖力（做某事）
· topple down 推翻；颠覆；倒塌
例句再现
The boy slipped and fell down from the stairs． 男孩滑了一下，从楼梯上摔了下来。
She took a false step and fell down into the pit． 她踩空掉到坑里了。
When the house fell down, nobody was in it． 房子倒塌的时候，里面没有人。
The child fell down over a wooden stake． 那个孩子被木桩绊倒了。
He lost his footing and fell down from the roof． 他没站稳，从房顶摔了下来。
004
fall for 上当，听信；爱上
重点解析 ▲ fall for可以表示“上当，听信”，另外也可以指“迷恋，爱上”。for作介词，引出对象。
情景对话
James: Don't fall for their tricks. They are trying to cheat you out of your money.
Lewis: Thank you for your warning. I won't.
詹姆斯：不要中他们的诡计。他们想骗你的钱。
路易斯：谢谢你的提醒。我不会的。
触类旁通
· be taken in 受骗；被接纳
· be fooled 上当；受骗
· lose one's heart to 爱上；倾心
例句再现
She is wise enough not to fall for his flattery． 她很聪明，不会被他的阿谀奉承所蛊惑。
What makes you feel she is bound to fall for it？ 你凭什么认为她肯定会信以为真？
I can't believe you should fall for her story． 我真不敢相信你竟然相信她的话。
He never thought he would fall for her． 他从没想过自己会爱上她。
She fell for him as soon as she saw him． 她对他一见倾心。
005
fall in love 爱上
重点解析 ▲ fall in love意为“爱上”，其后可接介词with，表示“爱上某人”。形容某人“深坠爱河”，可以用fall/be head over heels (in love) (with)来表达。
情景对话
Jane: We fell in love at first sight. Last month he asked me to marry him and I said yes.
Jim: Congratulations!
简：我们一见钟情。上个月他向我求婚，我答应了。
吉姆：恭喜！
触类旁通
· be gone on sb（非正式）对……入迷；爱上
· fall madly in love 疯狂地相爱
例句再现
He started to fall in love with her gradually． 他渐渐爱上了她。
We fell in love with this place immediately． 我们立即就爱上了这个地方。
She doesn't want to fall in love, fearing to get hurt again． 她怕再次受伤害而不想恋爱。
He fell in love with a girl he shouldn't love． 他爱上了一个不该爱的女孩。
They fell in love all over again ten years later． 十年后他们再次相爱。
006
fall into 陷入；开始做；属于
重点解析 ▲介词into表示“在……中，在……里”，短语fall into的基本含义为“陷入，落入”。此外fall into还可以表示“开始做；属于”等意思。
情景对话
Hill: What's her reaction when hearing the news?
Jane: She let her head fall into her hands and started to sob.
希尔：听到这个消息她是什么反应？
简：她把头埋在两手间，开始哭了起来。
触类旁通
· fall under 倒在……下；归入……类
· sink into 陷入；沉入
· fall into place 变得有条不紊，开始有头绪
· fall into line 排齐
例句再现
Be careful not to fall into the ditch． 小心点，不要掉进沟里。
By no means will they let it fall into the hands of their competitor.
他们绝不会让它落入竞争对手手里。
Do you think he will willingly fall into her trap？ 你认为他会心甘情愿地陷入她的圈套吗？
She fell into conversation with the storekeeper． 她和店主聊了起来。
007
fall out 争吵；解散；出现……的结果
重点解析 ▲ fall out表示“争吵”时，其后可加介词over，引出争吵的原因，加with引出争吵的对象；fall out还可以指“解散；掉队；出现……的结果；（头发或牙齿）掉落”。
情景对话
Dan: Can you imagine that they used to fall out a lot?
Elinor: Really? But they seem to get along quite well now.
丹：你能想象他们过去经常争吵吗？
埃利诺：真的吗？但是他们现在的关系似乎很好。
触类旁通
· fall out of 从……掉出来
· fall out of use 停止使用
例句再现
There is no need to fall out over trivial things． 没有必要为了小事而争吵。
The commander told the men to fall out after a long drill.
经过长时间的操练后，指挥官命令士兵们解散。
Some students fell out due to tiredness． 一些学生由于疲劳而掉队。
It fell out as people had expected． 结果正如人们预料的那样。
One book falls out of her bag when she is walking． 她走路时，一本书从她包里掉了出来。
008
fall on 倒在……上；在（某天）……
重点解析 ▲ fall on中on为介词，其字面含义为“倒在……上”。fall on sb/sth有“袭击……；扑向……”之意；此外，on后面接日期时，该词组还可以指“（庆典或特别事件等）在某天，适逢某天”。fall的主语为描述责任、责备等词汇时，该短语表示“……由某人负责”。
情景对话
Eden: When is your birthday, Emily?
Emily: My birthday falls on a Sunday this year.
艾登：艾米丽，你的生日是什么时候？
艾米丽：今年我的生日正好是星期日。
触类旁通
· fall on deaf ears 未受到重视，未被理睬
· fall on one's knees 跪下；乞求
· fall on hard times/evil days 倒霉，遭遇不幸
例句再现
The expenses fell on him． 费用由他支付。
He fell on the ice the first time he learned to skate． 他第一次学滑冰时，在冰上摔倒了。
The troop fell on the enemy from the rear． 军队从后面袭击敌人。
The full weight of supporting the family falls on her． 养家的重担全落在了她的肩上。
Christmas fell on a Sunday last year． 去年的圣诞节是在星期日。
009
fall off 从……脱落；（价格等）下降
重点解析 ▲ off作介词时，fall off有“从……脱落，从……掉下来”之意；off作副词时，该短语还可以指“（价格、销量等）下降”，此时fall off可以单独使用，不接宾语。
情景对话
Grant: What happened to your leg?
Jack: I fell off my bike and broke a leg yesterday.
格兰特：你的腿怎么了？
杰克：昨天我从自行车上摔了下来，摔断了一条腿。
触类旁通
· go down（价格、水平或数量）下降，下跌
例句再现
He sat in front of the door and saw leaves falling off the tree． 他坐在门前，看树叶从树上落下。
He fell off the ladder and broke his arm． 他从梯子上掉下来，摔断了胳膊。
The sales of vegetables fell off sharply in the past four months.
过去的4个月，蔬菜销量急剧下降。
He had a dream about himself falling off a cliff． 他梦见自己从悬崖上掉下来了。