想请教以下句式的用法(1) It is a matter of concern to ...(2) It has been recognized that ...(3) We generally expect that...(4) can aggravate the problem of...

想请教以下句式的用法(1) It is a matter of concern to ...(2) It has been recognized that ...(3) We generally expect that...(4) can aggravate the problem of... It is fun to trave around the world!的句式用法 Will Be 的用法,句式,用法,句式 it is time 的用法, 英语句式用法请教“愿...天长地久”用英语怎么说 before 与从句 和各种句式 的各种用法如题 比如 It is long before.之类的我也说得不是很清楚 英文句式语法和词组解释1.It is not far off that of one of the ten new members which joined on May 1st 2004.主要谈谈that of的用法.2.steady hand at the wheel 关于一些单词的意思和用法another / any other / agin /about 这四个单词要用在什么句式里?for / to / do / if / is / it is that it 是什么句式 关于think 的用法有这样一个句式 sb.thinks it +adj.to do但如果是想要表达 I think it is + n.（如 I think it is our duty to ......） 时是否有be动词存在? what is more difficult句式用法造句 quiet 的用法和句式 it is high time that的用法 It is/was time that 的用法 So it is with me的用法 it is no use的用法 请教以下句子里,of的意思和用法.Of all the subjects,I like history best because it gives us a useful knowledge of things in the past. 英语if you are interested it is 是什么句式前面是 如果你感兴趣 那么后面为什么要加it is 呢 这是什么用法啊