I bought a pen for you中for you做什么成分

I bought a pen for you中for you做什么成分 I bought a pen yesterday.画a pen He bought a pen. I bought a book for 将下列句子改成现在完成时态速度速度I bought a pen last week.I ___ ___ a pen for ___ ___ .四个空! I bought a pen改为被动句如何改 还有I buy a pen I am looking for a pen. 英语翻译 I bought a computer for a song.for a 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 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 I bought a pen to did（还是do?） my homework. she bought me a pen yesterday→I（）（）（）（）yesterday 改错I'm useing a pen which he bought it yesterday i was bought a pen by her yesterday.怎么翻译啊? Yes,I bought you a pen.的问句!跪求!~谢谢 I bought a computer for ___.I often use it. I bought a computer for ___.I often use it. I bought a caot by ten pounds.还是I bought a caot for ten pound.