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- Present perfect - Wikipedia
The present perfect is a grammatical combination of the present tense and perfect aspect that is used to express a past event that has present consequences [1]
- Uses of English verb forms - Wikipedia
The present perfect continuous (or present perfect progressive) construction combines some of this perfect progressive aspect with present tense It is formed with the present tense of have (have or has), the past participle of be (been), and the present participle of the main verb and the ending -ing
- Continuous and progressive aspects - Wikipedia
Continuous and progressive in various languages Unless otherwise indicated, the following languages treat continuous and progressive aspects the same, in which case the term continuous is used to refer to both
- Atmospheric river prompts flood watches, evacuation warnings . . .
An atmospheric river is threatening to unleash flooding rain and mudslides across Southern California, triggering evacuation warnings in Los Angeles
- Present continuous - Wikipedia
The present continuous, also called the present progressive or present imperfect, is a verb form used in modern English that combines the present tense with the continuous aspect [1]
- Perfect (grammar) - Wikipedia
Perfect (grammar) The perfect tense or aspect (abbreviated PERF or PRF) is a verb form that indicates that an action or circumstance occurred earlier than the time under consideration, often focusing attention on the resulting state rather than on the occurrence itself An example of a perfect construction is I have made dinner
- Simple present - Wikipedia
The present simple is the most commonly used verb form in English, accounting for more than half of verbs in spoken English [1] It is called "simple" because its basic form consists of a single word (like write or writes), in contrast with other present tense forms such as the present progressive (is writing) and present perfect (has written)
- Imperfective aspect - Wikipedia
Imperfective aspect The imperfective (abbreviated NPFV, IPFV, or more ambiguously IMPV) is a grammatical aspect used to describe ongoing, habitual, repeated, or similar semantic roles, whether that situation occurs in the past, present, or future
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