1.There were about nine hundred poeple at the concert.
否定句：There were not about nine hundred poeple at the concert.
一般疑问句：Were there about nine hundred poeple at the concert?
对nine hundred提问：How many poeple were there at the concert?
2.There was only one porblem.
否定句：There wasn't only one porblem.
一般疑问句：Was there only one porblem?
对only one提问：How many porblem were there?
3.Ann did her homework yesterday evening.
否定句：Ann didn't do her homework yesterday evening.
一般疑问句：Did Ann do her homework yesterday evening?
对yesterday evening提问：When did Ann do her homework?
4.My brother was in the park just now.
否定句：My brother wasn't in the park just now.
一般疑问句：Was your brother in the park just now?
对in the park提问：Where was your brother just now?
5.She had some bread for lunch today.
否定句：She didn't have some bread for lunch today.
一般疑问句：Did she have some bread for lunch today?
对some bread提问：What did she have for lunch today?