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- It must be very costly to keep up a large house like this. 维修这样一所大房屋一定得花不少钱。
- I can't date that house exactly, but it must be very old. 我不能确切地说出那所房子的年代，但一定是很古老的。
- It must be very large. 肯定很大吧。
- It must be very degrading to have to beg for money. 必须向别人乞讨钱一定是非常可耻的。
- Have you ever done that? It must be very exciting. 你坐过吗?一定很刺激。
- It must be very unreliable and uncomfortable. 这样原始，性能一定不可靠，坐上去也一定不舒服。
- It must be very difficult at sea, too. 海上的日子想必也很不好过吧。
- It must be very upsetting for you, Ms White. 这一定让您非常着急,是吧,怀特女士?
- It must be very exciting, I think. 我想一定非常激烈。
- It must be very happy if we can share it together. 喜欢旅游，音乐，电影和读书。
- Alistair: It must be very expensive. 阿利斯泰：那一定很昂贵。
- Your city at that latitude, it must be very cold! ! 你的城市在那个纬度，一定很冷吧！！
- I suppose it seems to you a kind of curse. It must be very dismal. 你觉得那是一种诅咒。那一定是种令人伤心的诅咒。
- I can't date that house exactly,but it must be very old. 我不能确切地说出那所房子的年代，但一定是很古老的。
- I can't date the pot exactly,but it must be very old. 我不能确切断定这把壶的年代，但它一定很古老。
- It must be very interesting saling on the wide ocean. 在辽阔的海洋上航行一定很有趣。
- It must be very thrilling. Were you scared? 肯定很刺激。你害怕吗?
- First, it must be very light, the lighter the better. 首先,它必须很轻,越轻越好。
- Listen! The baby is crying out loud! It must be very hungry. 听!那婴儿在大声哭!一定是饿极了。
- It must be very costly to keep up a house like this. 维修这么一幢房子一定很昂贵。
