英语问题求教追问it is the first time sb have done sth这个固定句型要怎么理解后面一定

英语问题求教追问it is the first time sb have done sth这个固定句型要怎么理解后面一定 It is first time that sb.have done sth. it"s the first time that sb have done sth It is the first time that sb do sth. It is the first time that .这个句型中后面一定要跟完成时? it's important that sb is done sth有这个句型吗 有it is time for sb.doing sth.和it is time for doing sth.这个句型吗 It is the first time that .句型的问题. it's the first time that sb.have done到底是不是强调句 It is /was for the first /second ...time that sb.do /did sth it is the first time 句型用法 It is time We went to bed.是这个句型吗 It’s time(for sb．)to do sth