2)there be是英语中非常重要的一个句型： there是引导词，不解释 "那里"; 这是个倒装句， 主语在be动词的后面， be动词的单复数由后面的主语决定。
注意中国学生容易搞错的问题：
There isn't enough furniture in the room.(房间里家具不够)
错：There hasn't enough furniture in the room.
There is no doubt that smallpox has been wiped out in China.(毫无疑问，中国已消灭天花。)
错：It is no doubt that smallpox has been wiped out in China.
There is ample evidence that AIDS is spreading quickly in Asia. (充分证据表明，爱滋病正在亚洲迅速蔓延。—— 同位语从句)
错：It is evidence that AIDS is spreading quickly in Asia. (可以： It is evident that AIDS is spreading quickly in Asia. - 主语从句)
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