'It's hot and sticky groaned,' Mr Khong.
Mr Khong groaned (that) it's hot and sticky.
'English is my favourite subject,' exclaimed Mr Khong and Ms. Williams.
Mr Khong and Ms. Williams exclaimed (that) their favourite subject is English.
'Mr Khong's skin always becomes dry in UK weather' said Ms. Williams.
Ms. Williams said (that) his/Mr Khong's skin always becomes dry in UK weather.