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2. Formation of the present perfect: Regular verbsThe Present Perfect tense of any English verb is formed from the Simple Present of theauxiliary to have, followed by what is generally referred to as the past participle of theverb.Most English verbs form the past participle in a regular, predictable manner. Theseverbs are commonly referred to as regular verbs.The past participle of a regular English verb is formed by adding the ending ed to thebare infinitive of the verb. For instance, the past participle of the verb to work isworked .Thus, the Present Perfect tense of the verb to work is conjugated as follows:I have workedyou have workedhe has workedshe has workedit has workedwe have workedthey have workedSee Exercise 1 .The following contractions are often used in spoken English:Without ContractionsI haveyou havehe hasshe hasit haswe havethey haveWith Contractionsrveyou"vehe·sshe·sit"swe"vethey"veIt should be noted that the contractions for he has, she has and it has are the same asthe contractions for he is, she is and it is.See Exercise 2 .3. Spelling rules for adding ed to form the past participleSome regular verbs change their spelling when the ending ed is added to form the pastparticiple.

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