look!i have bought a digital camera.是否正确?这类问题到底要考虑什么方面呢?

look! I have bought a digital camera yesterday.是否正确? I _____ a new dictionary.Look!It's very useful.A.bought B have bought 选B为什么呢 look!i have bought a digital camera.是否正确?这类问题到底要考虑什么方面呢? I _____ a dictionary.I ____ it in the bookshop.A.have bought;bought B.bought;bought Look!I bought a gift for you.意思 May I have a look? may i have a look? can i have a look ____ you bought any books?Yes,I ____ some two week ago.A.Have,have bought B.Did,bought C.Have,bought D.Did,have bought选择题 What a pity I have no money.Otherwise I (bought;will bought;would have boug What a pity !I have no money.Otherwise I (bought;will bought;would have bought;would buy)选哪个? I have bought a car.() A.I have bought one B.I bought one C.So did I D.So have I I _____ my mobile phone since five years ago.A.bought B.have bought C.had bought D.have had 请告诉我语法与答案.最好有为什么A: You look very nice in your new dress today. B: Oh, really? I _________ it when it was on sale. A. buy B. bought C. have bought D. will buy 选择合适的一项,将对话补充完整.A DO you like english? B Who bought it C can i have a look选择合适的一项,将对话补充完整.A DO you like english? B Who bought it C can i have a look D i I ( )a new dictionary.It is very useful.A.bought B.have bought I have already bought a bike.(改为否定句) i just have bought a car.和i have just bought a car.两者意思相同吧