has; gone
have; thinking about
4. has; begun/ started; collect tea sets
5. have been; twice
6. have been; quite a few
欢迎提问，乐意解答；愿你满意, 望你采纳。
does go
the tea show
did have considered
had started to collect the tea-things
had gone twice
have a few days
I have stayed a couple of days
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