Question

Which sentence contains italicized words that are used as an infinitive phrase?
A. Mark wanted to go, but not today.
B. Tom went there for some flour.
C. Jane parked her car behind a truck.
D. Kelly went to the grocery store.

Answer 1

First, the infinitive phrase must contain the word "to", so the only options are A and D.

In D "to" is a preposition: it specifies the spacial relation: to the grocery store.

The infinitive phrase is "to go" and the answer is A.