Yes, you are quite correct.
Most sentences follow that pattern,
and adverbs could come between a subject and an object or an object and a verb.
Also like most of other languages, adjectives come right before nouns.
Here are some more things you should keep in mind to make a simple sentence in Korean.
1) Sentence order - subject + object + (ending)verb
2) Subjects can be omitted if it is quite obvious out of context, especially in spoken Korean.
3) Any noun can be a subject or object,
but to make the noun a subject in a sentence we put the subject markers like "이"/"가".
Without the subject markers the noun is just a noun.
4) Likewise, to make a noun an object, we put the object markers like "을"/"를".
5) In English, a predicate is almost a verb, but in Korean adjectives can be predicates.
Taking your sentence as example,
"Frank hit Sally"
프랭크+때리다+샐리(English sentence order)
In here the sentence order should be "프랭크+샐리+때리다"
1) putting a subject marker
프랭크+가 샐리 때리다.
the subject : 프랭크가
2) putting an obejct marker
프랭크가 샐리+를 때리다.
the object : 샐리를
3) taking care of the tense
프랭크가 샐리를 때렸다.(simple past)
Now we've got a totally perfect sentence.^^
^________^