这是什么时态啊 I bought a pair of socks yesteday.我昨天买了一双短袜.这是什么时态?是一般过去时?还是过去完成时?

这是什么时态啊 I bought a pair of socks yesteday.我昨天买了一双短袜.这是什么时态?是一般过去时?还是过去完成时? i bought a sweater for you .please put it on 这句话是什么时态 He bought a new car是什么时态 I finished reading a book last night.这是什么时态? I'd like a shirt 是什么时态? I am a student是什么时态 I bought a bike last year.I是主语bought是谓,bike宾语a 和last year 是什么语啊? I bought him a book中的bought是什么系动词吗大神们帮帮忙 Yes,Iwas.,I bought a schoolbag.的意思是什么? I was so tired that I could not walk any more是什么时态这是什么时态啊, I bought this dress 2 years ago She borrowed a book from the library yesterday改为现在完成时态 I could是什么时态 i had just received a letter from my sister.这是什么时态,这种时态一般怎么用 The coat was bought in Shanghai.是什么时态, I bought a book for I bought some beautiful flowers.some beautiful是什么成分啊? bought的现在时态 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!