Contaminar means ‘to pollute’. It is a regular -ar verb: contamino (present), contaminé (preterite), contaminado (past participle), contaminando (gerund).
Contaminar in use
Las fábricas contaminan el ríoThe factories pollute the river
No debemos contaminar másWe must not pollute any more
Contaminar el medio ambienteTo pollute the environment
On this pageIndicative
Indicative
Statements of fact, certainty and objective reality
The other perfect tenses (haber + past participle) and the past subjunctive
The imperfect subjunctive has two forms: -ra (more common in speech) and -se (more formal; still heard in speech in Spain, mainly written in Latin America). Both are equally correct and interchangeable.
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