until a bridge was built here, people....20 miles upstream to cross the river safely.
...must be walking
---must have had to walk
---must have to walk
---Sanaka: Workmen have been surveying the field across the road this week.
kao: They.......new houses on it.
---must be building
---must have to build
---must have bulit
---
The children in the class I teach are very helpful. Normally, I.....tell them to keep the room tidy, they just do it without being asked.
---mustn't
haven't got to
--don't have to
I went straight in to see the bank manager. I...wait at all
---din't have to
hadn't got to
mustn't
People.....accept that they can't have better public services without paying higher taxes.
must
must to
have got to
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