[Grammar] HELP！I have a grammar problem.

[Horizonincumt]

The spiral of heated air and most air begins to twist and grow and spin faster and faster in a counterclockwise direction.
what's the object part of the sentence and why?:roll::roll: Thanks a lot~~

 

[Raymott]

The spiral of heated air and moist air begins to twist and grow and spin faster and faster in a counterclockwise direction.

Do you think the sentence is transitive?

 

[Horizonincumt]

Yes.But it is from our text book, maybe it has some reasons.

 

[tzfujimino]

Hello, Horizonincumt.:-D
In your sentence, "The spiral of heated air and moist air begins to twist and grow and spin faster and faster in a counterclockwise direction.",
the underlined part (called an "infinitive phrase") is the object of the verb 'begin', in my opinion.