We are going on a trip.

Meaning: This sentence tells us that the group of people are about to start a journey for pleasure.

Choice of Words: We is the group of people including the speaker. Are is the present tense of the verb be. Going is the present participle of the verb go. On is used to show that something is happening or continuing. A is used before a singular noun to show that it is one of many. Trip is a journey, especially one for pleasure.