it is ... that句型有哪些？

it is ... that句型有哪些？

It is (was)+形容词（或过去分词）+that…… 结构中, 常用的形容词：
natural (自然的),appropriate (适当的),advisable (合适的),preferable (更可取的),
better (更好的)，necessary (必须的),important (重要的),imperative (急需的)
urgent (急迫的),essential (本质的),vital (必不可少的)，crucial（紧急的）
probable (很可能的),possible (可能的)，desirable (极好的)，advisable（合理的）,
compulsory（必须的）,desirable（理想的）, essential（必要的） ,
imperative（迫切的）,incredible（惊人的）,necessary（必要的）,
possible（可能的）,strange（奇怪的）,urgent（紧迫的）。。。
It is important that
It is believed that
It is interesting that
It is necessary that
It is suggested that
It is time that

该句式 有四种情况 1that从句是定语从句2that从句是主语从句3that从句是同位语从句4that是强调句型中的虚词。