MODAL VERBS (different functions)
NOTES FROM CLASS
need to (to do something in order to achieve something)- have to (obligation)
didn't need to - needn't have + p.p.
I didn't have to/ didn't need to buy flowers because my friend did it. (you didn't buy because it was not necessary)
I needn't have bought flowers, but I did. ( you did the action, but it was unnecessary)
should have +p.p. - regret, critics
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