I am confused about verbs. Have seen the following categorisation:
Past Simple
Past Perfect
Past Continuous
Past Perfect Continuous
Past Subjunctive
I understand that Past is a Tense. But what about the second categorisation ? Is it Mood, or something else. Are there any great books about description of such things about grammar ? Would this be linguistics ? Nothing too complicated though.
Have encountered Oxford Guide to English Grammar and Cambridge Grammar of English. How do they compare ?