student asking question

Will it be grammatically right sentence even if there is no "what's"? (This sentence is actually called a mnemonic device)

teacher

Native speaker’s answer

Rebecca

Yes, you are correct! If you wish to remove "what's" from the sentence, you could rephrase the sentence to "this sentence is actually called a mnemonic device." Ex: This is what's called a verb tense. Ex: This is called a verb tense.

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