Tense sequence indicates a logical time sequence.
Use Present Tense in universally true statements not limited to a particular time.
Use Present Tense in statements about the contents of literature and other published works. This is the eternal present.
Use Past Tense in statements concerning writing or publishing of a book.
Use Present Perfect Tense for an action that began in the past but continues into the future.
Use Past Perfect Tense for an earlier action that is mentioned after a later action.
Use Future Perfect Tense for an action that will have been completed at a specific future time.
Use a Present Participle for an action that occurs at the same time as the verb.
Use a Perfect Participle for an action that occurred before the main verb.
Use Subjunctive Mood to express a wish or state a condition contrary to fact.
Use Subjunctive Mood in that clauses after verbs like request, recommend, suggest, ask, require, and insist; and after such expressions as it is important and it is necessary.
|Principal Parts of Verbs|
|All verbs have five forms:||Regular||Irregular|
|base form (infinitive)||walk||go|