it is too expensive for （either还是both） of us to buy 为什么?

it is too expensive for （either还是both） of us to buy 为什么? The car is too expensive for her to buy 还是 to buy it? 请讲明理由 It is not n for us to buy expensive clothes The food from England is too expensive for us to buy.(保持原句意思 the furniture is too expensive for us to buy 同义句 1.the computer is too expensive for me to buy ( ).空里要不要加it The watch is too expensive for me to buy.（改为同义句）The watch is The car is too expensive for us to afford.afford是及物动词呀 为什么后面 为什么The exercise is too difficult for anyone of us to do it?错 The iPhone is too expensive for her to buy（保持原句意思） the car is too expensive for me to afford it 为什么还加it the coat is too expensive for me to buy该成too...to...结构