He bought a pen , but it didn"t work(改为同义句）

He bought a pen. He bought me a pen yesterday 改为被动语态 改错I'm useing a pen which he bought it yesterday He bought a pen , but it didnt work(改为同义句） i has bought a pen 和 i bought a pen 的区别请问：i has bought a pen 和 i bought a pen 表达的意思有区别吗,还是意思都一样,只是写法不同,可以通用.写错了 是 应该是 he has 以及 he bought I bought a pen yesterday.画a pen He bought the pen three day ago.转换同义句 Has he got a pen He writes( )a nine pen. he writes( )a nine pen I bought a pen改为被动句如何改 还有I buy a pen Bill bought a new pen.Mike bought a new one,too (改为同义句) Bill bought a new pen.______ ______ Read the conversation and write down the questions and answers.---Hi,Don!---Hello,Andy!---What's that in your hand?---It's a letter from my pen pal.---Really?Where is your pen pal from?---He's from Singapore.Do you have a pen pal,too?---No,I don't.Bu He bought h_a new pen,because his old one is broken 修改错误I'm using the pen which he bought it yesterday. 同义句：Tom bought a pen yesterday. Jack bought a pen yesterday,too.Tome bought a pen yesterday.___ __Jack.()I believe Shanghai is ___most beautiful city in China.A.the second B.second C.a secong D.the first He wanted to bought a new book. He bought a new car是什么时态