last year buy a watch这句话什么意思

last year buy a watch这句话什么意思 "I buy a watch last year"means I_____(not buy)a house last year. 列句：He bought a house last year.Did he buy a house last year? he bought a house last year.did he buy a house last year?he i-----(watch) tv last year. Jim helped his mother (buy) a new watch last month.用buy还是to 这句话什么意思：not 怎会修饰a year,应该是后面句子 Last year they had a 什么 trip. This watch cost $60 last year I was sorry to hear that he had a coid last week这句话什么意思 I make a chocolate cake for my birthday last year.这句话的过去式怎么说