要用run 就不能有be ,be running 是進(jìn)行時(shí),could be running 是情態(tài)動(dòng)詞的進(jìn)行時(shí),
情態(tài)動(dòng)詞也有三種時(shí)態(tài),一般式 could run
進(jìn)行時(shí) could be running
完成時(shí) could have run那could be running是什么意思那人可能在跑步作鍛煉。could be running表示可能在跑步
The man could be running for exercise.為什么用running而不是run 謝啦在線等
The man could be running for exercise.為什么用running而不是run 謝啦在線等
英語(yǔ)人氣:589 ℃時(shí)間:2020-01-30 22:26:47
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