Answered

In the sentence   The football players train for the big game.    what part of speech is train
                            The train sped over the tracks.                       what part of speech is train?
                             The light is burning brightly                                   "           "               light



Answer :

The football players train for the big game. Train is a verb.
The train sped over the tracks. Train is the subject.
The light is burning brightly. Light is the subject.

Answer:

Verb, noun, subject

Explanation:

In the first one, train is a verb because it is what the players are doing. In the second one, train is a noun because it is talking about the thing called a train. In the third one, light is the subject because the verb says what it is doing.