She said that memorizing the words of pop songs also helped a little.此句中为什么没有be动词?如题.

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She said that memorizing the words of pop songs also helped a little.此句中为什么没有be动词?如题.
She said that memorizing the words of pop songs also helped a little.此句中为什么没有be动词?
如题.

She said that memorizing the words of pop songs also helped a little.此句中为什么没有be动词?如题.
有help不用be