Do和Is怎么区分

Do和Is怎么区分 it is my job doing/ to do?怎么区分?为什么? considered to do和considered to have done怎么区分 一般疑问句是用Do ,Does还是Is,Are,怎么区分我老是弄不清一般疑问句是用Do ,Does还是Is,Are?到底怎么区分呢? do you need to do… 和need you do…?怎么区分?如何判断疑问词用do还是need? Will be 和is going to be 怎么区分? Will be 和is going to be 怎么区分? 怎么区分是用Are来问还是do来问还是is或does can`t和mustn`t还是区分不开比如1I () do that because my mother has told me not toI () go there because the meeting is begining.帮我再造几个区分的句子被怎么区分啊?要区分的道理通过句子总结下啊，不是只要句子 怎么区分区分氢氧化铝和硅酸? 怎么区分AI/AO/DI/DO find it +adj+to do 和 find that 哪个是正确的?怎么区分? 英语语法 do和be在什么情况下用一般疑问句 ,怎么区分用法 use to do sth和use doing sth怎么区分啊 does she和has she怎么区分用法比如Jane has nothing to do ,为什么用does she?两个要怎么区分 __the right decesions__the future is probably the most important things we'll ever do in our lives.A.Making concerned B.Make concerningC.To make concerned D.Making concerningconcerned和concerning到底怎么区分? 英语中for 和to 有什么区别?比如在做介词时怎么区分：用for 、to 填空these math problems are too difficult ( ) us.(for / to)somking will do harm _____you.the house is big enough ________us two . 区分can do sth.和could do sth.