TAILIEUCHUNG - Building grammar skills for TOEFL IBT part 7

Tham khảo tài liệu 'building grammar skills for toefl ibt part 7', ngoại ngữ, toefl - ielts - toeic phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Building Grammar Skills Grammar Point 19 - Verb Tenses There are 3 tenses in English - Simple Continuous and Perfect and each one has a special meaning. In general the Simple tenses are used to describe actions the Continuous tenses arc used to describe interrupted actions and the Perfect tenses arc used to put events into order. When talking about tenses it is very important to remember the time marker. There are many time markers - usually preposition phrases. Each tense can be used in each time - past present and future. Each tense has its own unique meaning and each one needs to be considered in relation to other tenses. Before we examine the tenses we need to make one important distinction between two types of verbs. All verbs in English can be classified as cither main lexical verbs or helping auxiliary verbs. Auxiliary verbs are further sub-divided into either tense auxiliary verbs to be to do and to have and modal auxiliary verbs. Describing Now 1. Present Continuous also called Progressive This tense is made with the auxiliary verb to be and the present participle -ing form . It is used to describe actions which are happening NOW. The action is interrupted by this sentence . lam ialkins. You are studying It can also be used to describe plans which absolutely cannot be changed. Tomorrow I m mv boss at 7 00. My plane is leavintr at 6 30 tonight. Remember When you use the any continuous tense the verb has 2 parts - the auxiliary and the participle. If you omit either one the verb is incomplete. I talking is wrong Remember There are some verbs that are usually not used in the continuous tenses. 87 Copyrighted material Building Grammar Skills 2. Simple Present This tense is used to describe what usually happens or hobbies. The structure is very easy Subject Simple Form of the Verb . I wake up al 7 00. Canadians know about history. If there is no time marker the present simple is preferred to the present continuous. 3. Present Perfect This tense is used to

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