What's an Infinitive? An Infinitive is the full form of the verb for example, to scream, to eat, to hurl, to jump. The form you would find in the dictionary.
What's a conjugation?A conjugation is when you take a verb like for example To scream, and you change the endings, so that it's clear, who is doing the action.
Here's an example:
To scream- I scream you scream he screams Notice the 's' at the end? English does not have as many endings, but Latin does. This is a conjugation.
Now, let's look at the Latin. Latin has Infinitives too, but they are contained in one word not two like English. For example, amare- to love, pulsare- to hit, ambulare-to walk Here is an example of a Latin verb conjugated,
Amare- to love In a Latin dictionary, you will see this, amo, amare, amavi, amatus ( You must memorize all forms) The first form, amo- is the first person of the Present Tense, I love. amo ( I love) amamus ( we love) amas (you love) amatis (you(pl.) love) amat (he,she loves) amant (they love) Notice the personal endings in black? Latin has a lot more endings than English. This is the Present tense conjugation.