2. The Relative Adverbs not only qualify any Part of Speech except a Noun or a Pronoun but also connect sentences; (as, I do not know where he lives). The chief Adverbs of this kind are: as, how then, when, where, while, why whereas, and whereby. This is the place where the murder was committed. I don’t know the place where he lives. (= I don’t know the place at which he lives.)I don’t know the reason why she hates me. (= I don’t know the reason for which she hates me.)I still remember the day when he returned home. (= I still remember the day on which he returned home.) 3. The lnterrogative  Adverbs are the same in form as the Relative Pronouns, but they are used in asking questions (as, Where did you go?) The chief Adverbs of this kind are: when, where, why whence how far and how long. Examples are:  When will you finish this job? How long will you stay here? How often do you visit them? How soon can you begin work? Where do you live? How many students are there in the class? How often does the committee meet? Why did you quit? Why do you hate her?
2. The Relative Adverbs not only qualify any Part of Speech except a Noun or a Pronoun but also connect sentences; (as, I do not know where he lives). The chief Adverbs of this kind are: as, how then, when, where, while, why whereas, and whereby. This is the place where the murder was committed. I don’t know the place where he lives. (= I don’t know the place at which he lives.)I don’t know the reason why she hates me. (= I don’t know the reason for which she hates me.)I still remember the day when he returned home. (= I still remember the day on which he returned home.) 3. The lnterrogative  Adverbs are the same in form as the Relative Pronouns, but they are used in asking questions (as, Where did you go?) The chief Adverbs of this kind are: when, where, why whence how far and how long. Examples are:  When will you finish this job? How long will you stay here? How often do you visit them? How soon can you begin work? Where do you live? How many students are there in the class? How often does the committee meet? Why did you quit? Why do you hate her?