We smell something ____

We smell something ____ .

The correct answer is burning. Let's delve into the reasoning behind this selection:

The context of the sentence dictates the appropriate form of the verb to use after the verb "smell." In English grammar, when verbs of sensation (such as smell, taste, see, hear, etc.) are followed by another verb, that verb is typically in its present participle form (which ends in -ing).

The choices given are variations of the verb "burn":

• Burned: This is the simple past form of the verb "burn." It would not be appropriate here as it signifies a completed action in the past. The sentence aims for something that is happening in the present moment.

• Burning: This is the present participle form of the verb "burn." It signifies an ongoing action, which aligns perfectly with the sentence structure indicating something currently being sensed.

• Burns: This is the third person singular present form of the verb "burn" and does not fit grammatically here, as "something" is the subject and it needs a participle form to show continuous action.

• Burn: This is the base form (infinitive) of the verb and does not fit in this construction, as we require a present participle to represent the current, ongoing action being sensed by smell.

Therefore, burning is the correct choice. This aligns with the grammatical rules concerning verbs of sensation followed by present participles, ensuring the sentence properly conveys an ongoing action perceived by the sense of smell.