TAKOBOTO

because of, due to (indicates only negative meaning)
Due to lack of sleep, I have a headache today
he died because~, he lost his fortune because~,...

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ねぶそくのせいで、きょうはあたまがぼんやりしている

Due to lack of sleep, today I'm absent minded.

あいつのせいで、せんせいにしかられた。

Because of him, I was scolded by my teacher.

わたしはしっぱいしたのは、かれのせいだ。

Because of him, I failed.

でんしゃがおくれたせいで、ちこくした。

I was late because the train was late.

あついせいか、しょくよくがない。

Since it's hot, I have no appetite.

たいふうのせいで、りょこうにいけなかったんです。

We did not go on the trip because of the typhoon.

てんきのせいか、きぶんがわるい。

It's the weather's fault that I don't feel good.

がくせいがじょうずにならないのは、おしえかたがへたなせいかもしれない。

Maybe the student is not becoming good because of the poor way of teaching.

ねつがあるせいでなにをたべてもおいしくない。

Those food all not taste to me because of i feel fever.

かのじょがパーティーにこなかったのはびょうきのせいだ。

It was because she was ill that she didn't come to the party.

わたしがしっぱいしたのはたいだのせいだ。

My failure is due to the fact that I was lazy.

かれらのとうちゃくがおくれたのはあめのせいだった。

Their late arrival was owing to the rain.

かのじょのびぼうはとしのせいでおとろえた。

Her beauty withered with age.

きのせいか、かれはきょうはなんとなくげんきがなくかんじられた。

Is it my impression? He seems to be not feeling well.

せいで;のせいだ;せいで;せいか

ziaz

所為 (せい) (n) cause/ reason/ fault (from WWWJDIC) Using the Kanji in this grammatical construction is likely very rare, however.

leslie

What happened to the English verisons of ex #6428,ex #6429,ex #6430 and ex #6431?

bamboo4

Ex 6429 The translation should be..Because of him,I failed.

gahoangdai

About the Ex 6430．。。The Translation should be...Because of the late train,So I came late!

gahoangdai

What's with the か after せい、and how do you know when to use か、で, or nothing at all after the せい？

Izumi19

Ex. 6430 should be translated as "I was late because the train was late (or delayed).

lucinda lohmanoota

I came to hear, that せいか can also have positive results. Can someone approve of that?

Cyrus

@Cyrus: Yes seika is used whether the result is desirable/undesirable
Ex: Jp:Kanojo ga iru seika shigoto ga yoku dekiru.
Eng:I think it is because she is here that i can do a lot of work.

ichigo_venky