As an adjective : " The family celebrated the octogenarian's 81st birthday " .
Octogenarian is a noun and it is used to refer to someone who is 80 to 89 years old.My aunt is an octogenarian.
'Would you like this candy or these desserts to follow the meal?'This is being used as an indicator for a singular item, and these is being used as an indicator for multiple items.See the related...
I have decided to clean out my garage next week. - as a verb we are having a clean out at home on the weekend. - as a noun
Example sentence - I heated the water in the kettle to make tea.
When I prepare to write a speech, the idea summary will be found in the topic sentence.