Write It Right
Continually and Continuously. It seems that these words should have the same meaning, but in their use by good writers there is a difference. What is done continually is not done all the time, but continuous action is without interruption. A loquacious fellow, who nevertheless finds time to eat and sleep, is continually talking; but a great river flows continuously.
Convoy for Escort. "A man-of-war acted as convoy to the flotilla." The flotilla is the convoy, the man-of-war the escort.
Couple for Two. For two things to be a couple they must be of one general kind, and their number unimportant to the statement made of them. It would be weak to say, "He gave me only o