The standard order of elements in a basic affirmative sentence in English is essential for clarity of communication. Analyze the statements about English syntactic structure.

I. The most common order in simple affirmative sentences is Subject − Verb − Object/Complement (SVO).

II. Frequency adverbs (such as always, never, often) are generally placed before the main verb, except with the verb "to be," where they come after it.

III. In yes/no questions that use auxiliary verbs (do, be, have) or modals (can, will), the auxiliary or modal generally begins the sentence, preceding the subject.

The correct statements are: