It had been a long and tiring day
這是漫長而又累人的一天。
It is very tiring work.
這是很累人的.工作。
I found the job tiring at first but I soon got used to it.
起初我覺得這份工作很累人，但很快就習慣了。
It's normal to feel tired after such a long trip.
這樣長途旅行之后感到疲勞是正常的。
I'm too tired even to think.
我累得連想也不愿意想。