"We eat the mushrooms."
Translation:Noi mangiamo i funghi.
lo comes before an "impure s," which means either "z" or "s" as part of a consonant cluster: lo squalo, lo zucchero.
il comes before any other consonant, including a "pure s": il ragazzo, il suono. And
l' comes before a vowel, whether the word is masculine or feminine.
Regular verbs conjugate predictably, based on how the infinitive ends. "Mangiare" is a regular -are verb, so you just follow the chart:
(There are two conjugation patterns for regular -ire verbs, but I don't know how to tell which is which.)
If the stem already ends in
i, don't add an extra