The rainfall exacerbated the flood problem.
The verb in this sentence is the word "is." When you use the verb "to be," you must use the correct form of it.
Herb is a noun not a verb.
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The complete verb in the sentence is "should use."
no you need a verb and a noun
You cannot since it is not a verb.
does is not a modal verb
The word "run" is a verb. Example sentence: She runs in the park every morning.
(to exacerbate means to make a problem worse) "Changes in the tax law will only exacerbate problems in capital investment." "The closure of one garage was expected to exacerbate parking woes at the airport." "The coming elections will likely exacerbate the conflicts within Congress."
Don't exacerbate the problem by arguing back to your mother.
A physical verb is a verb that is used to describe the action of a sentence
It depends on the sentence. Was is a past tense singular verb.