🔊 原版音檔暫缺 — 可先聽瀏覽器朗讀
There is a small difference between 『was able to』 and 『could』. Take a look at the following sentences:
Do you think we can substitute the phrase 『was able to』 in the sentences above with the word 『could』? If not, why not?
Please join Li and Catherine for a full explanation of the subtle differences between 『was able to』 and 『could』.
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