They were so busy talking with each other that they forgot the time怎么解释?为什么so后面是动词的ing形式啊?

The traffic was too busy.So they were late 同义句转换The traffic was too busy.——they were late They weren't able to come because they were so busy at two hours ago .这句话有没有问题 They were busy.(变成一般疑问句) They were all busy e______ something. They were so busy talking with each other that they forgot the time怎么解释?为什么so后面是动词的ing形式啊? They were too busy.They said nothing.(合并为一句）They were _____ busy _____ say nothing. I didn't know you were so busy. soon they were busy talking in and on happily意思 翻译 They were busy last weekend but happy. they were busy yesterday evening.改为否定句 they have no idea at all how busy we were They were busy with the making of the lanterns and (were) busy preparing food.这里(were)可不可以省略? 1． —Can children swim in this pool?—Yes.However,they ____ never do so alone.A．may B．need C．could D．shouldC为什么不行?10．You have no idea ____ those days.A．that we were how busy B．how busy were weC．that how busy we were D． because they were so joyful,happy,blest, They were so busy that they hardly took _______ at the beautiful dusk.A glance B a glanceD glancing D glances此题答案为什么选B,请分析一下, They both have _____ work to do,so they are _____ busy.(单选题) they are busy,so they have to talk about it at l_____ in the dinning-room. I didn't know you were so busy一般疑问句I didn't know you were so busy 一般疑问句我想的是Did you know me was so busy?错了么