Question

Most major cities _________ significantly over the last 30 years.​

Answer 1

The correct option is "have grown". The blank is filled as such: Major major cities have grown signiticantly over the last thirty years.

• The correct option is determined by finding more about the tense of the sentence.

• Since the sentence is in perfect tense have grown is rightfully used here.

• Have, has and had are used in all perfect tenses.

Answer 2

Answer:

Most major cities have grown significantly over the last 30 years.

Past Perfect Tense:

• The tense of the given sentence is past perfect.
• In past perfect tense, the verb in the sentence is written in its past participle form preceded by has or have, i.e., has + past participle of the verb or have + past participle of the verb.
• Have is used in the sentence when the subject is I, you, we, or they.
• Has is used in the sentence when the subject is he, she, or it.
• In the given sentence, the verb is grow. The past participle of grow is grown.
• Since the subject in this sentence is they, have is used with the verb.

Therefore, most major cities have grown significantly over the last 30 years.

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