經典句型一 it 強調句型
強調句型的基本構成：
it is /was 被強調部分 who/that 剩餘部分(不論強調的是哪一部分，後面只能用who或that)
原句的謂語動詞如果是現在或將來時態用it is....that /who 。
如果原句的謂語動詞是過去時態，則用it was .....that /who 。
強調時間，地點，原因或方式時不能用when ， where ， why ， 或how ，必須用that .
經典句型二 there be 句型 表示“什麼地方有.....”
there be 之後如有幾個並列主語時，用單數謂語動詞或用複數謂語動詞要取決於第一個主語是單數還是複數。
there is a pen ， a pencil and two books on the desk .(就近原則)
there will be an important conference named the earth summit to be held here .
there have been great changes in my hometown ever since 1980s .
there must be something wrong with the cellphone.
there be 句型的其他用法。
there be 句型也可以有其他形式變化，常見的有seem to be ， happen to be ， appear to be ， used to be ， is likely to be 等。
there seems / appears to be much hope of our team winning the match .我們隊似乎很有希望贏得比賽。
there are likely to be more difficulties than expected while carrying out the experiment .
在實驗過程中，可能會有比預計的要多得多的困難。
the thief broke in ， to his delight ， there happened to be nobody in the room .
小偷破門而入，令他驚喜的是，恰巧房間裡面沒有人。
there be 句型中的be 動詞，也可以替換成其他動詞，常見的有live ， remain ， come ， stand ， lie ， occur ， exist ， follow 等。
once there lived many dinosaurs here millions and millions of years ago .
there stand many skyscrapers (摩天大樓)in the modern city .
there lies a railway in our city .
there came a time when ，ost of people demanded for freedom and equality .
there exist serious issues in the world and we should take action to solve them before it is too late .
there be 句型的獨立主格形式作狀語
there being no time left ， we must hurry .
=because there was no time left ， we must hurry . 沒剩多少時間了，我們必須抓緊。
there having been no rain for a long time ， the crops in the field died .
=because there had been no rain for a long time ， the crops in the field died . 久旱無雨，地里的莊稼都死了。
有連詞時用句子，沒有連詞時用there be 獨立主格形式作狀語.