1. They ___________ the meeting time. hasn’t forgotten haven’t forgotten haven’t forgot hasn’t forgot. 2.Why __________ so much the cellphone? have you use has you used has he used have he use. 3. My mom _____________ a Robot. has never driven has never drove have never drove. 4. My friend ___________ the best computer. haven’t bought hasn’t buy hasn’t bought haven’t buy. _______ sciense to help humanity? haven’t arisen hasn’t arise has arisen have arose. Match the sentences with their correct use: I have been a teacher for 10 years. She has just fallen in the street. We have discovered a new place to dance They have not seen each other this week He has not done the English homework. what is the correct structure used in the present perfect? SUBJECT+BE+COMPLEMENT SUBJECT+HAVE/HAS+PARTICIPLE VERB+COMPLEMENT SUBJECT+HAVE/HAS+BASE VERB+COMPLEMENT SUBJECT+HAD+PARTICIPLE VERB+COMPLEMENT.
