原句是这样的：(when) I fastened my seat belt.The plane took off 要用when连接句子 我觉得应该是 when i had been fastening my seat belt the plane had been taking off.但是不确定对不对,如果不对是怎么样的 主要是为什么 英语
网友回答
【答案】 i had been fastening my seat belt when the plane took off.
这样也可以吧?“当飞机降落的时候我已经系好安全带了”
个人觉得“when”连接的是一个时间点,而不是一个持续的状态