Underline the correct verb form to complete each sentence.

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2. Has the ice (froze, frozen) on the pond?

5. The baby has (broke, broken) the toy.
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Which one would be correct for each sentence? Because it seems to me that they both make sense.

Help appreciated. :)

You need to learn and understand the principle parts of these (and other) irregular verbs.

Present tense: freeze, break
Past tense: froze, broke
Past participle; (has) frozen, (has broken)

Which do you think is the correct verb form for each sentence?

So you mean whenever there is a had, has or have in a sentence. I use the the past partiple?

Yes. You've got it! Here are some more examples:

I have written her an email.
The child has begun to learn to read.
He has swum in several state meets.
Dad had just lain down for a nap when the phone rang.

To determine the correct verb form for each sentence, we need to identify the appropriate tense and verb agreement.

2. Has the ice (froze, frozen) on the pond?
The correct verb form in this case is "frozen." The verb "has" indicates the use of the present perfect tense. In this tense, the helping verb "has" is followed by the past participle form of the main verb, which is "frozen." Therefore, the correct form is "Has the ice frozen on the pond?"

5. The baby has (broke, broken) the toy.
The correct verb form in this case is "broken." Just like in the previous sentence, the verb "has" indicates the use of the present perfect tense. In this case, the past participle form of the main verb "break" is "broken." Therefore, the correct form is "The baby has broken the toy."

In both sentences, the correct verb form is using the past participle form of the main verb, "frozen" and "broken," respectively.