Change correct the following sentences for subject-verb agreement tense and fragments.

Going home now, how I wish I could get there before it start to rain.

I wish I could get home before it starts to rain.

Am going home now,I wish to get there before it start to rain

To correct the sentences for subject-verb agreement, tense, and fragments, the following changes need to be made:

1. "Going home now," - This is a sentence fragment as it does not have a subject and a verb. To fix this, we can add a subject to the sentence. For example, "While I am going home now, how I wish I could get there before it starts to rain."

2. "before it start to rain" - The verb "start" should agree with the subject "it." Since "it" is a singular pronoun, the verb should be in the third-person singular form. Therefore, it should be changed to "before it starts to rain."

After making these changes, the corrected sentence will be: "While I am going home now, how I wish I could get there before it starts to rain."

Note: Keep in mind that there may be alternative ways to correct the sentence, but the provided solution ensures subject-verb agreement, proper tense, and eliminates sentence fragments.