"Did you bring a book?"
All Klingon syllables start with a consonant, and so do all suffixes (with just one known exception: -oy). So em (starting with a vowel) is not a possible Klingon word.
Daqem'a' splits up into Da·qem·'a' -- Da- is a prefix meaning "you - him/her/it/them" and -'a' is a suffix for forming yes/no questions.
Can you quess what qem might mean?