We must raise more funds for our search怎么反意疑问?

问题描述:

We must raise more funds for our search怎么反意疑问?
这句是祁使句吗?

这句不是祈使句.
We must raise more funds for our search, mustn't we?
表示 "一定要, 必须"时, 反意疑问句附加部分用mustn”t 或 needn”t
表示推测 "一定是, 必定是"时, 反意疑问句附加部分有下列情况:
A). 当陈述部分有 must be ...时, 反意疑问句附加部分用 be 的现在时态.
e.g. He must be very tired, isn”t he?
must have + 过去分词 表示对过去的推测
(1)单纯表示对过去的推测, 与现在无关, 反意疑问句附加部分用过去式.
e.g. He must have come yesterday, didn”t he?
(2)表示对过去的推测且影响到现在或持续现在, 反意疑问句附加部分用现在完成式.
e.g. You must have studied English for years, haven”t you?