What are the functions of the following verbs in this sentence?
It might help leave a better impression?
Is might a modal? How about help? leave?
What are the functions of the following verbs in this sentence?
It might help leave a better impression?
Is might a modal? How about help? leave?
The example sentence mentioned
- It might help leave a better impression.
is already highly processed syntactically. First there is the question of what it is.
Does it represent some activity (like saying "Thank you") that might help leave a better impression?
Or is it a dummy subject inserted by Extraposition?
Either one is possible, and in fact they mean the same thing. But we don't know because the sentence is context-free.
As to the structure, it's pretty much the way @Shoe put it:
Might is a modal, followed by an infinitive complement without to, which is itself a verb (help) that takes an infinitive complement VP, with or without to -- in this case without -- (leave a better impression). That's all, really.
[
vpmight [vphelp [vpleave a better impressionvp]vp]vp].
Might is a modal verb that is followed by a bare infinitive (help).
Help is a catenative verb that may be followed by a bare infinitive (leave) or a to-infinitive (to leave).
Leave is the catenative complement of the verb help.
You can read about catenative verbs on ThoughtCo: What is a Catenative Verb?