Three example sentences of my own composition
Ｓが～することに挑戦する ：challenge oneself to do
① I have decided to challenge myself to improve my English skills.
② She may have to challenge herself to keep on dieting for a few years.
③ Never stop challenging yourself to break free from smoking.
Ｓが～することに挑戦する ：challenge oneself to do
① I have decided to challenge myself to improve my English skills.
② She may have to challenge herself to keep on dieting for a few years.
③ Never stop challenging yourself to break free from smoking.
