to act /ækt/ /ækt/
to perform /pərˈfɔːrm/ /pəˈfɔːm/
to operate /ˈɑp.əˌreɪt/ /ˈɒpəreɪt/
to do /du/ /duː/
have an operation /hæv ən ˌɑpəˈreɪʃən/ /hæv ən ˌɒpəˈreɪʃən/