The document discusses different English tenses: - The Simple Present Tense is formed with subject + auxiliary verb + main verb and has exceptions for the 3rd person singular and verb "to be". It is used for habitual or general actions. - The Present Continuous Tense is formed with subject + auxiliary verb "be" + main verb + "-ing" and is used differently than the Simple Present Tense. - The Present Perfect Tense uses the auxiliary verbs "have" and "has" plus the past participle of the main verb, but its use can vary between British and American English. - The Present Perfect Continuous Tense is formed with subject + "have/has" + "been"