英语；为什么是keep us informed?不是keep sb doing?

英语；为什么是keep us informed?不是keep sb doing? It is quite important for us to keep healthy.为什么是for不是to? 这个英语句子为什么是对的?regular exercise can help keep us from getting too fat.为什么不是keeping?不是help do 不好意思。heip 后面不是一个句子吗？我想说heip doing Information Technology 可否缩写为 Infor-nologyInformation Technology 缩写成IT有点不好看 能不能缩写成Infor-nology? 英语提问：为什么是Have you been to the US .而不是Have you gone to the US How to keep us safe英语作文题目是How to keep us safe 要60词左右 Pls keep us keep us on our to keep us 英语the news he told us ---------very important 为什么是填is 翻译 1)He exercised until his body cried for a rest.2)Don't let the high prices keep you from starting a collection of your own.为什么是let us not play 而不是let us don't play do everything for us children为什么是us不是our? 英语中though---the soldiers are very tired,---they keep on working.A,though / B,though,but 为什么是A keep us health keep us healthy?哪个对 keep eyes _________ 为什么是wide open 不是 open wide? Keep your eyes closed ,这里为什么是clousd 呢 i couldn't keep my tears back为什么是back， he has a wife and ten children to keep,poor fellow keep在这里怎么翻译啊 为什么是keep