"To get along" is an infinitive phrase.
The infinitive form
The infinitive is to burn. Since infinitives often act as other parts of speech (nouns, adverbs, adjectives) they do not have tenses.
The phrase "must have" is usually regarded as a compound verb, but some grammarians might say that it consists of the active verb "must" and the infinitive verbal "have". ("Must" is one of the few verbs in English for which the word "to" can be omitted in the infinitive form of an immediately following verb.)
adverb
It is the INFINITIVE.
"Get" is a verb, "to get" is the infinitive of that verb.
infinitive
"To admit" is the infinitive of the verb.
"To get along" is an infinitive phrase.
"To rub" is the infinitive verb.
verb and verb (infinitive)
Infinitive
The infinitive form
The word "can" is a verb. The infinitive is "to be able to", it is a modal verb.
Temer is a verb, specifically an infinitive (to fear).
"To be" is a two word verb form called an infinitive.