e.g. We want to leave. I like to sleep. She tries to help. They go running.
In these sentences what grammatical term would you use for want/like/try/go, and what would you call to leave/sleep/help/run? How do you differentiate between the two verb-roles?
I’m not looking for „infinitive” as an answer. Is the 1st group called primary verbs of the sentence? Auxiliary verbs? Helping verbs? Linking-verbs? Is the 2nd group called secondary verbs? Main verbs? Verb-objects? Linked verbs?
And while at it: what would be the grammatical term for this whole structure? I used the word multi-verb structure, but maybe there’s a better way to describe it.