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同学好，
There be 句型是英语中常用句型， 意思是“有”，表示“人或事物的存在”或“某地有某物”。
There be 句型的构成形式一般为“There is/are + 某物/人 +某地/时”，表示某地/时有某物/人。
疑问句形式是将be或will/have/can/must等助动词、情态动词提至there之前，否定形式则直接在be或助动词、情态动词后加not。
如：Excuse me. Is there a repair shop near here for MP3? 打搅了，附近有MP3维修店吗？
There isn't harm in trying.不妨一试。
There be句型的特殊疑问句有以下三种形式：
1. 对主语提问：当主语是人时，用 “Who’s + 介词短语?”；当主语是物时，用 “What’s + 介词短语?”。其中there在口语中常常省略。注意：无论原句的主语是单数还是复数，对其提问时一般都用be的单数形式(回答时却要根据实际情况来决定)。如：
There is a bird in the tree. →What’s in the tree?
There are some bikes over there. →What’s over there?
2. 对地点状语提问：用 “Where is \ are + 主语?”表示（注意其答语变化）
如：There is a computer in my office. → Where is the computer? ----It’s in my office.
3.  对数量提问：一般有两种提问方式：
如果主语是可数名词，无论是单数还是复数，都用“How many +可数名词复数+ are there + 介词短语？”
如：There are twelve months in a year. →How many months are there in a year?
如果主语是不可数名词，则用“ How much + 不可数名词 + is there + 介词短语？”
如：There is some money in my purse. →How much money is there in your purse?
祝学习愉快~