First, “Also,” is not “also.” “Also,” means, “Moreover,” and “also” means “, too.” and “as well.”
Generally speaking, “also” is placed like Frequency Adverbs (always, often, usually, hardly ever / rarely /seldom, never, ever; sometimes*)
“also” meaning “too” is placed…
- after the verb “to be” when “to be” is the main verb: I am ALSO Spanish.
- before the rest of the verbs: I ALSO learn French.
- If the verb with a subject has two words, “also” comes just before the main verb, this is, the last verb in the verbal phrase, not before the auxiliary or the modal auxiliary: I have ALSO finished. I can ALSO bring some sandwiches.
- If the verb with a subject has three words, “also” comes just after the first auxiliary: I have ALSO been working as a French teacher for the past two years. (I have been ALSO working as a… is also possible!) If the auxiliary is a modal auxiliary, you have two options: you need to place “also” after the second auxiliary if you contract the modal and the auxiliary: You could’ve ALSO bought her a card. If you use the full forms, you can say You could ALSO have bought, or You could have ALSO bought…
In any case, check your meaning is right, because “also” will always affect the word that is closest to it!