为什么Usually,they give us some candy as a treat .里面的candy的y没有改成ies.

为什么Usually,they give us some candy as a treat .里面的candy的y没有改成ies. Usually they give us some candy as a usually they give us some candy as a treat.candy为什么不加s,我在有的书上看到它是可数名词 把They usually give us a treat of some candies.改为同义句. 把They usually give us a treat of some candies.改为同义句. Americans usually give a reason when they have to say _n__ to an invitation. they usually sit watching tv. 为什么用watching? what do they usually do改为what are they usually do行不,为什么一定是do 我是初学, They give you e_____. They usually exercise ._ _ they usually (对打“”部分提问) What do they usually do?他们通常做什么?个人感觉后面的“do”有点多余.What do they usually do?改为What do they usually?为什么不行呢? 像They often watch TV.He usually read books a像They often watch TV.He usually read books after supper.里,动词为什么要用原型 they usually have s____ rooms. however ,what most parents fail to see is that the best early education they can give their children is usually very cheap old people are often killed because they usually cannot__very well为什么括号里是填listen而不是hear they usually go hiking on foot on weekends.这里go hiking 为什么不用go to hjking. They usually watch TV after supper.But this time they are listening to the radio.为什么watch不加es 语法if的问题主句是一般现在式,重句是什么式?例：Usually,if they do not give us a treat,we can play a trick on them.if you don'come ,we will go home.主句是一般现在式,可为什么从句不一样?