Question

what is the subject in the sentence?... tell Arnav to come with me

Answer 1

The subject is ARNAV.............

Answer 2

1.
Tell Arnav - is the subject in the sentence .

Explanation :
Subjects are basically in english are basically referred to as the noun , pronoun , noun - phrase who does an action ar about whom we are talking . Subjects can be quite long in English.

Points to remember :
Its not necessary that subject always starts from the begining itself ❌❌ . Subjects can be preferred in the bottom of a sentence too .
2.
To come with me : predicate in the sentence .

Explanation :
The predicate is the part of a sentence that tells us what the subject does or is. In general , the predicate is everything that is not the subject.
Points to remember :
Predicate always contains verb ,for we say , verb is the heart of a predicate or the base of a predicate . The purpose of predicate is to complete an idea about the subject, such as what it does or what it is like.
Hope it helps