1.My uncle has been collecting stamps for four years.

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1.My uncle has been collecting stamps for four years.
It is four years _____ my uncle _____to collect stamps.
2.He gave me a book as my birthday presant.
A book____ _____to me as my birthday presant.
第2个“改为被动语态”.请问什么叫被动语态.

1.It is four years (since) my uncle (started) to collect stamps.
2.A book （was）（given） to me as my birthday presant.
被动语态：
用汉语举个例子：我把他逗笑了.被动语态就是：他被我逗笑了.
我把饮料喝完了.饮料被我喝完了.

1.My uncle has been collecting stamps for four years. My uncle likes collecting stamps. He has many b_______stamps they have been collecting stamps for 10 years We have been collecting stamps for five years . Mary has been collecting 300 stamps. Tom has been collecting stamps since She has been collecting stampsл! We have been collecting stamps for five years.(同义句转换） My uncle has been living here for twenty years (用since 改写) 这 My uncle has been living here for twenty years.(改为同义句） My uncle has been in Taiwan for thirty years,but Jinan is st I have been collecting stamps _______i was nine years old