stop + 動名詞意指「結束某個進行中的動作」，而兩個動詞之間沒有因果關係。
- I stopped working for them last year.
- I have stopped cycling to work.
- Could you stop bringing your dog to the office?
- He stopped eating meat in January.
stop + 不定詞意指「為了做另一件事而中斷某件事」，因此不定詞是用來表達停止某動作的意圖。
- I stopped to have lunch at 12:00.
- It's difficult to concentrate on what you are doing if you have to stop to answer the phone every five minutes.
- We stopped to look at the wildflowers.
- I stopped to take a break, but I'll start again soon.