Question

Which sentence has a verb in the infinitive form?

Running a marathon takes serious commitment and training.

Sugar is added to food to make it sweet.

Groups of people gathered in the park that Sunday.

The students liked to walk to school in the rain.

Answer 1

Sugar is added to food to make it sweet

Step-by-step explanation:

any verb that is preceded by "to" is infinitive

Answer 2

"The students liked to walk to school in the rain"

Step-by-step explanation:

For infinitive verbs, there has to be the word "to" in front of the verb. In this case, it is "to walk".