I want to buy a backpack.(改为否定句)

I want to buy a house _______money. I want to buy a present______mu cousin I want to buy a hair c____ I+want+to+buy+a+postcard. I want to buy a _______of shorts. I want to buy a p____of shose want,ruler,buy,I,a,to back home 在下句如何理解I want to buy some presents to everyone back home. I want to buy a pair of_shoes I want to buy a paiI want to buy a pair of_shoesI want to buy a pair of_shoes I want to buy a gift I want buy a gift 哪个对?为什么 i have a coat ,i want to buy a b I want to buy some I want ( )a pen ( )$4.A buy for B to buy for C buy from D to buy from I want to buy a touch!I'm in england now ,so the computer ,which I use now, can't use chinese.now I want to say . I want to buy a touch when I come back to china ,but maybe I do not know almost everything about it . I wonder ..how much is it now .and i want to go back. I want to buy a silk scarf.Do you want to buy one?(同义句转换) I want to buy a silk scarf._ _ 改错I want to buy she a present． i have enough money and want to buy a car