Grammatical tense is the expression of location in time of an action or state. Grammatical aspect is the expression of the temporal structure of an action or state. English verbs express two tenses and four aspects for a total of eight verb forms.
Simple (Non-continuous) Present Tense
The term simple present tense refers to verbs in the simple aspect, present tense, indicative mood, and active voice. In the English language, the simple present tense form of verbs is used to describe habits and routines, to state general facts and truths, and to express thoughts and feelings. The article Forming the Simple Present Tense of English Verbs: Spelling Changes and Pronunciation explains the rules for forming the simple present tense of English verbs including spelling changes and pronunciation.
The article Present-Tense: How to Use Non-continuous Verbs in English for ESL Students explains the use of non-continuous, or simple present tense, verbs as compared to continuous, or progressive aspect, verbs in the English language.
Simple (Non-continuous) Past Tense
The term simple past tense refers to verbs in the simple aspect, past tense, indicative mood, and active voice. In the English language, the simple past tense form of verbs is used to describe completed actions, to describe past habits and routines, to state past facts and truths, and to express past thoughts and feelings. The articles Forming the Simple Past Tense of English Verbs: Spelling Changes and Pronunciation and How to Pronounce and Write -ed Suffixes in the English Language explain the rules for forming the simple past tense of English verbs, both regular and irregular, including spelling changes and pronunciation.
Progressive (Continuous) Aspect
The progressive aspect is a verb aspect that expresses incomplete or ongoing actions or states at a specific time in the past, present, or future. The article The Formation and Use of the Progressive Aspect in English explains the verb phrase patterns, which require some form of the verb be followed by a present participle, for the progressive aspect as well as the use of the present progressive and past progressive in the English language. The related article Lesson Plan for Teaching ESL Progressive Tenses provides the necessary information and some suggested activities for teaching the progressive aspect to ESL students.
The article How To Conquer That Present/Past Indicative and Progressive Verb Trap explains the difference in meaning among the simple present tense, the present progressive aspect, and the present emphatic forms and among the simple past tense, the past progressive aspect, and the past emphatic forms.
Perfect Aspect
The perfect aspect is a verb aspect that expresses and emphasizes the past, present, or future consequences resulting from past actions or states. The article The Formation and Use of the Perfect Aspect in English explains the verb phrase patterns, which require some form of the verb have followed by a past participle, for the perfect aspect as well as the use of the present perfect and past perfect in the English language. The related article Lesson Plan for Teaching Perfect Tenses ESL provides the necessary information and some suggested activities for teaching the perfect aspect to ESL students.
Perfect-Progressive Aspect
The perfect-progressive aspect is a verb aspect that expresses ongoing actions or states that began in the past and continue to a specific time in the past, present, or future. The article The Formation and Use of the Perfect-Progressive Aspect in English explains the verb phrase patterns, which require some form of the verb have followed by the past participle been and then a present participle, for the perfect-progressive aspect as well as the use of the present perfect-progressive and past perfect-progressive in the English language. The perfect-progressive aspect is closely related to the perfect and progressive aspects.