Asa kara ame ga furitsuzukete imasu.

It has been raining continuously since this morning.

Kare wa akiramezu ni, doryokushitsuzukemashita.

He did not give up and kept making an effort.

Nihongo o benkyoushitsuzukereba, kanarazu jouzu ni narimasu yo.

If you keep studying Japanese, you will surely become good at it.

Kanojo wa sanjikan mo piano o hikitsuzukete imasu.

She has been continuing to play the piano for three hours.

Kodomo no koro kara, kono nikki o kakitsuzukete imasu.

I have been continuing to write this diary since I was a child.

Shippai shitemo, jibun o shinjitsuzukeru koto ga taisetsu desu.

Even if you fail, it is important to keep believing in yourself.