Drop by 表示短暂、随意地拜访，通常没有事先正式约定。它可以指去看朋友、邻居，或途中去一下办公室、商店：drop by for a coffee。
想在对话中用 drop by 吗？
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drop by (+ place); drop by + someone's place/the office; drop by for + a coffee/a chat; drop by to + verb
- If you're near the library later, drop by and I'll give you my notes.
- My sister dropped by for a coffee on her way home from work.
- Could you drop by the office tomorrow to sign the contract?
修改原因
修改前If you're free after work, drop by to me for a cup of tea.
修改后If you're free after work, drop by my place for a cup of tea.
用 to me 指明来找谁，看起来似乎合理。但这个拜访表达后面直接接地点：my place、the office、the shop。因此把 to me 改成 my place。
Drop in 意思很接近，但结构不同。拜访某人用 drop in on：I dropped in on my aunt。去某个地方用 drop in at：drop in at the bakery。Drop by 后面则直接接地点，不加介词：drop by the bakery。
动手练习
I'll ___ your flat on my way home and return the umbrella I borrowed.
查看答案
drop by — 你回家途中会去朋友的公寓一趟，空格后又直接是地点 your flat，所以选 drop by。Drop off 用于送某个人或某样东西到某处：I'll drop off your umbrella。不能用 drop off your flat 表达拜访公寓。
邀请朋友来短暂坐坐。使用 drop by，说明哪一天，以及你会把什么东西交给对方。
Drop by on Saturday morning and I'll give you the camping tent you asked about.
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