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tense is the same for an irregular verb as for a regular verb. In both cases, the SimplePresent of the auxiliary to have is followed by the past participle of the verb.For instance, the irregular verb to take has the past participle taken. Thus, the PresentPerfect of the irregular verb to take is conjugated as follows:See Exercise 6.I have takenyou have takenhe has takenshe has takenit has takenwe have takenthey have taken6. Questions and negative statementsAs is the case with other English tenses, questions and negative statements in thePresent Perfect are formed using the auxiliary. In the case of the Present Perfect, theauxiliary is have or has.a. QuestionsIn order to form a question, the auxiliary is placed before the subject of the verb. Forexample:Affirmative StatementI have worked.You have worked.He has worked.She has worked .It has worked.We have worked.They have worked.Qu estionHave I worked?Have you worked?Has he worked?Has she worked?Has it worked?Have we worked?Have they worked?b. Negative statementsIn order to form a negative statement, the word not is placed after the auxiliary. Forexample:Affirmative StatementI have worked.You have worked.He has worked.She has worked .It has worked.Negative StatementI have not worked.You have not worked .He has not worked.She has not worked.It has not worked.