続ける
つづける (tsuzukeru)
to continue, to keep on
verb (ichidan)
Example
日本語の勉強を三年間続けています。
にほんごのべんきょうをさんねんかんつづけています。
Nihongo no benkyou wo sannenkan tsuzukete imasu.
I have been continuing to study Japanese for three years.
A useful verb for expressing persistence and ongoing actions. Often used with ～ています to show continuous action.