▲ 谓+主+状 该句型通常用于表达某地存在某物（人）

词序
 3  状语
 1  谓语
 2  主语
 3  状语
 
 
 地点
 存在
 物或人
 地点
 
词性
 介词+名词
 (There  be)
 名词
 介词+名词

(介词短语)
 

注：该结构中的状语可以置于句首或句尾。

1 桌子上   有    一钱包。

        某地   there is     某物
●  There is a wallet¹ (钱包) on  the desk .

      =On the desk, there is a wallet.

●There is not a wallet (钱包) on the desk

●Is there a wallet (钱包) on  the desk?

 
●  There is a wallet钱包 on  the desk in the room

on the second floor in the building in the school in BJ.

●There was² a wallet (钱包) on the desk .

▲ 一般时态的构成

      句型

  时态
 主系表
 谓主状
 
一般现在时态
 is, am, are
 there is (are)
 
一般过去时态
 was, were
 there was (were)
 
一般将来时态
 will be
 there will be
 
一般过去将来时态
 would³ be
 there would be
 

●There     is         a wallet (钱包) on the desk .

●There   was        a wallet (钱包) on the desk .

●There  will be    a wallet (钱包) on the desk .

●There  would be    a wallet (钱包) on the desk .

●There is a fool⁴白痴 from England on the desk in the room on the second floor  in the building in the school in BJ.

牢牢记住英语的第2个句型,重中之重是旗帜--------There be的变化