(I. 343)

Example sentences

(ksa). 
トムは二十年日本語の勉強を続けている。
Tom has been studying Japanese for the past 20 years.
(ksb). 
今年の冬は五十年の寒さだ。
This winter is the coldest one in 50 years.
(a). 
父は三十年、同じ会社に勤めています。
My father has been employed in the same company for the past 30 years.
(b). 
私はこの研究を十年続けてきました。
I've been continuing this research for the past 10 years.
(c). 
夜半の雨が、ようやく上がったようだ。
The rain which started after midnight appeared to have finally stopped.
(d). 
僕と岡田とは四十年の友人だ。
Okada and I have been friends for the past 40 years.
(e). 
今年の夏は六十年の暑さだそうだ。
They say that this summer is the warmest in 60 years.
(f). 
これは三十年の大雪です。
This is the heaviest snow we have had in 30 years.

Formation

(i) Noun (duration)
三十年For the past 30 years
(ii) Noun (duration)
六十年の大地震The strongest earthquake in 60 years