First of all it's "grammar" :D The "infinitive" is the base form of the verb, the unconjugated form. Infinitives in English are always preceded by "to" e.g. "to go" "to eat" "to run" Take the verb "to go" as an example. "to go" = the infinitive Now we can conjugate the infinitive into whatever tense we want to use like the present tense for example: I go You go He/she/it goes You (plural) go They go These are conjugations of the verb "to go." That's the best I can do.