高频介词 for / to / about / from
用途、对象、方向、来源各有固定含义。
be good for/from…to…/learn about
要点
  1. for 表示用途、对象、原因:be good for、thank you for。
  2. to 表示方向、对象:go to school、give it to me。
  3. about 表示「关于」或「大约」。
  4. from 表示来源、起点,常与 to 连用成 from…to…
  5. for 与 to 在"给谁"上分家:He bought a gift for his mother(为母亲买,东西还没到手)/ He gave it to her(这一下东西到了她手里)—— to 跟着传递的方向,for 跟着"替谁费事"。
  6. give / send / show / pass 这类词,双宾语能把 to 省掉:Show me your book. = Show your book to me.;buy / make / get 那一组省掉的是 for:Buy me a drink. = Buy a drink for me.
  7. from 与 of 在中文都成一个"的",英语不通用:learn from a mistake、hear from an uncle(收到他的消息)区别于 hear of him(听说过他)—— from 那侧都有"过来"这一层。
例句
Fruit is good for you.
水果对你有益。
I learned about farming.
我学到了关于农业的知识。
How far is it from here to the airport?
从这里到机场有多远?
Thank you for your help.
谢谢你的帮助。
He bought a gift for his mother and gave it to her.
他给母亲买了礼物,并把东西递到她手里。
I learned a lot from that mistake.
我从那次错误里学到了不少。
易错提示
  • be good for(对……有益)≠ be good at(擅长)。
  • from…to… 连接的两个成分要同类:from Monday to Friday。
  • 表"正要"的 be about to do 里 about 已不表"关于",后面也不再跟具体时刻(与「过去将来时」那条同);表"关于"的 about 后面接名词或 -ing。
  • thank / pay / ask 各挂各的介词,中文却都成一个"对/为":thank you for your help(为这事)、pay for the meal(付饭钱)、ask her for help(向她要)—— for 前后跟的词也不一样。