Word order: Where to place the adverb.

English has very strict word order rules. Many frequent time adverbs such as frequency adverbs (always, usually, never) or adverbs that indicate completion of tasks (already, still) must be placed between the auxiliary verb and the main verb:

subj  +  aux  +    ADV   +    verb
I             have   ALWAYS    been
we         don't    USUALLY   go

In cases where there is no auxiliary verb, such as affirmative sentences in simple present and simple past, they are placed between the subject and the main verb:

subj  +  aux  +    ADV   +    verb
you                     NEVER     say
she                   ALREADY  arrived

If the only verb is the verb to be, it will work as an auxiliary verb. Therefore, adverbs will come after:

subj  +  aux  +    ADV   +    verb
they         are       STILL                     at home
she            is       ALSO                     a great person