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English also has a present perfect continuous (or present perfect progressive) form, which combines present tense with both perfect aspect and continuous (progressive) aspect: "I have been eating". The action is not necessarily complete; and the same is true of certain uses of the basic present perfect when the verb expresses a state or a ...
The progressive aspects (also called "continuous tenses") are formed by using the appropriate tense of estar + present participle (gerundio), and the perfect constructions are formed by using the appropriate tense of haber + past participle (participio). When the past participle is used in this way, it invariably ends with -o.
The present continuous is formed by the present tense form of be and the present participle (-ing form) of the verb. [3] [4] For example, you would write the verb work in the present continuous form by adding the -ing suffix to the verb and placing a present tense form of be (am, are, is) in front of it: [3] I am working. You are working. She ...
The subjunctive (also known as conjunctive in some languages) is a grammatical mood, a feature of an utterance that indicates the speaker's attitude toward it.Subjunctive forms of verbs are typically used to express various states of unreality such as wish, emotion, possibility, judgment, opinion, obligation, or action that has not yet occurred; the precise situations in which they are used ...
subject I + habré future of haber will have + hablado past participle spoken yo {} habré {} hablado subject + { future of haber } + {past participle} I {} {will have} {} spoken The future of haber is formed by the future stem habr + the endings -é, -ás, -á, -emos, -éis, -án. The past participle of a verb is formed by adding the endings -ado and -ido to ar and er / ir verbs, respectively ...
Ivette Perfecto is an ecologist and professor at the University of Michigan. Her work focuses on complex eco system dynamics and the application of ecological theories to agricultural systems. Early life and education