jueves, 21 de abril de 2016

Must /mustn´t

ONLINE EXERCISES

Must/mustn’t:

Must/don’t have to (don’t have to = don’t need to)

Must/mustn’t / Have to/don’t have to:


You need to bear in mind that have to and need to are similar, and that don’t have to, don’t need to and needn’t are similar too.

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