He often____ (visit)the museum when he was in Beijing.

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He often____ (visit)the museum when he was in Beijing.
为什么是visits?

因为主语是第三人称单数,又是一般现在时,所以使用三单
再问：可是后面有when he was in Beijing 不是发生在过去的吗？
再答：这一句的意思是，他在北京的时候经常参观博物馆。这是在一时段内发生的频率事件，所以用visit
再答： visits
再问：那过去式遇到频率副词后面跟的动词就要变一般时态 right？
再答：不需要，你这个不是填空题么
再问：对呀...
再答： =_=
再问： So...
再答：填答案啊
再问： ...那到底什么情况要在过去式的句子中变一般时
再问：（执着...）
再答： ……
再答：你几年级
再问：初二啊（为什么有种被人鄙视了的感觉...）
再答：表示过去一段时间内经常或反复的动作，要用过去式
再答：例如说吧
再答：例：She often came to help me at that time.
再问：我好像已经被你弄晕了...（凌乱
再答： ……学姐这才几句话啊
再问： ...挫败感油然而生你几年级的
再答：初一
再问： Okay I see..学弟？or学妹
再答：学妹
再问：哦那学妹谢谢啊 anyway I'd better ask my teacher this strange question...
再答： You are welcome.虽然我不大懂你什么意思

He often____ (visit)the museum when he was in Beijing. When he was in Beijing,he ____ go to the Palace Museum again obama visited the palace museum when he was in beijing= obam when he was in beijing I was in Beijing on the day when he arrived. I was in Beijing on the day when he arrived. 和 I was in Beij he -----(visit) the usa.when he was fourteen 英语小小选择题When he was in Beijing,he ___go to that pub after wor He m_____ his parentes very much when he was in Beijing. Many years ago,he was a famous____(演员).He often____(扮演)the m He was born in Beijing in 1988 Mr Black was walking in the forest .He was scared when he he