This, however, is not all. What determines whether the two antecedents shall be in the same or in different propositions? I believe that the following rules for what may be called the distribution of the substantive antecedent will bear criticism.
Rule 1. That when there is any natural connection between the substantive antecedent and the verb governed by the relative, the antecedent belongs to the second clause. Thus, in the expression just quoted, the word master is logically connected with the word command; and this fact makes the expression, It is I your master who commands you the better of the two.
Rule 2. That when there is no natural connection between the substantive antecedent and the verb governed by the
relative, the antecedent belongs to the first clause. It is I, John, who command (not commands) you.
To recapitulate, the train of reasoning has been as follows:—
1. The person of the second verb is the person of the relative.
2. The person of the relative is that of one of two antecedents.
3. Of such two antecedents the relative agrees with the one which stands in the same proposition with itself.
4. Which position is determined by the connection or want of connection between the substantive antecedent and the verb governed by the relative.
Respecting the person of the verb in the first proposition of a complex sentence there is no doubt. I, your master, who commands you to make haste, am (not is) in a hurry. Here, I am in a hurry is the first proposition; who commands you to make haste, the second.