The spelling of the phrase "hadst one doubts" may seem confusing, but it follows Old English grammatical rules. The word "hadst" is the past tense of "have" in the second person singular form, meaning "you had". The addition of "st" at the end indicates that it is in the past tense and singular form. "One" means "any" or "some" and "doubts" refers to uncertainty. To pronounce this phrase, use IPA phonetic transcription: /hædst wʌn daʊts/.