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In modern English, the auxiliary verb used to form the present perfect is always to have. A typical present perfect clause thus consists of the subject, the auxiliary have/has, and the past participle (third form) of main verb. Examples: I have done so much in my life. You have gone to school. He has already arrived in America.
Between the stem and the inflectional endings that are common across most verbs, there may be a vowel, which in the case of the -er verbs is a silent -e-(in the simple present singular), -é or -ai (in the past participle and the je form of the simple past), and -a-(in the rest of simple past singular and in the past subjunctive).
The basic (present) perfect form, with the auxiliary in the present tense, may specifically carry the meaning of perfect aspect, as in English; however in some languages it is used more generally as a past tense (or preterite), as in French and German. The use of auxiliaries and meaning of the constructions in various languages are described below.
The simple (one-word) forms are commonly referred to as the present, the simple past or preterite [b] (past tense, perfective aspect), the imperfect [b] (past tense, imperfective aspect), the future, the conditional, [c] the present subjunctive, and the imperfect subjunctive. However, the simple past is rarely used in informal French, and the ...
The passé composé is formed by the auxiliary verb, usually the avoir auxiliary, followed by the past participle.The construction is parallel to that of the present perfect (there is no difference in French between perfect and non-perfect forms - although there is an important difference in usage between the perfect tense and the imperfect tense).
To form the imperfect for French regular verbs, take the first person plural present tense, the "nous" (we) form, subtract the -ons suffix, and add the appropriate ending (the forms for être (to be), whose "nous" form does not end in -ons, are irregular; they start with ét-but have the same endings). Verbs that terminate in a stem of -cer and ...
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 ...
The depletion of resources has been an issue since the beginning of the 19th century amidst the First Industrial Revolution.The extraction of both renewable and non-renewable resources increased drastically, much further than thought possible pre-industrialization, due to the technological advancements and economic development that lead to an increased demand for natural resources.