453 The tenses are used nearly as in English, but not altogether so; and their force (like that of all words and forms) is affected by the general meaning of the verb, by the context, or by other circumstances. The leading types are illustrated in 454, 455, 456, 457, 458, 459, 460, 461, 462, 463, 464, 465, 466, 467, 468, 469, 470; those in which Greek agrees with English are treated briefly, more prominence being given to those in which the two languages differ.