Zero = "0".
We use the term zero in grammar where some elements in a pattern is omitted.
Ex: We can use either the zero article or unstressed "some".
For most verbs, we add the ending -ed to show Past Simple Tense. But with some verbs, like cut and set, no ending is added.
Ex: need -> needed
but: cut -> cut
We can say that cut has a zero Past Tense form.
I hope this article helps. If you have any question, please leave a comment below.
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