Do you have to pay to use these computers? 为什么借此不用for而用PAY T

Do you have to pay to use these computers? 为什么借此不用for而用PAY T You don't have to pay for these things.They are totally_____ how much do i have to（ ）（pay for）it?为什么不用paid for,不是have+过去分 These children don't have to pay for the food的同意句是什么 These children don\'t have to pay for the food的同意句是什么 You don't have to pay for it.同义句转换:You don'tuse money.It---- even if they don't have to pay for school Children don‘t have to pay for school（ ）. You don't have to pay for your flights——they___in the price 英语翻译You don't have to pay for your flights;they're incljded All you have to pay only for the one love Can you show me how to use the pay phone、 这句话中 为什么how to 要加t