can - It`s allowed; It`s OK., can`t - It`s not allowed; It`s not OK., must - It`s necessary because it`s a strict rule., mustn`t - It`s forbidden., should - It`s a good idea. , shouldn`t - It is not a good idea., have to - It`s necessary as it`s required by a rule., don`t have to - It`s not necessary,

[BE A2+/B1] [Unit 4] [Grammar] [Modal verbs] [SB]

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