第1个回答 2011-08-15
如果是句子,那么是 There is a boy on the chair.
如果是短语,那么是 The/A boy on the chair.( on the chair作后置定语)
第2个回答 2011-08-15
There is a boy in the chair.
第3个回答 2011-08-15
There is a boy on the chair.
第4个回答 2011-08-15
There is a boy sitting on the chair.