a life-buoy, a life ring, a ring buoy / a swim ring

ring; circle / (by extension) linked network

absolutely, categorically, certainly, definitely, surely / inevitably, invariably, without fail, necessarily, always

to swim

time / an event, case, occasion, moment; a specific period in time / a time of something / a season / a tense / (literary) the time during which a narrative takes place

a float used in fishing / a fishnet float / a buoy / a float in a tank or other container, used to determine the level of liquid / a float used for safety or rescue, to keep a person from drowning

to use / to employ / to make use of, to apply / to spend

Please do (action)

Please do not (do)

please give me / (expressing a request) please do something for me