Grammar Info

N1 Lesson 4: 17/17

ことだし(And) so, Because, Since

Structure

Verb + こと
[い]Adjective + こと
[な]Adjective + (1) + こと
Noun + (1) + こと

(1) である

Details

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About ことだし

ことだし is a combination of the noun こと 'thing', the auxiliary verb だ, and the conjunction particle し, used for listing reasons. The whole structure itself often translates simply as 'because (A)', or 'since (A)', but places extra emphasis on there being other reasons besides what the speaker has specified.

This structure may appear after any word in its attributive form, or after a noun that has been followed with の.

Just like with its standard use in creating lists, し is being used in this grammar point to show that (A) is not exclusive. The way this comes across is that 'while there are other reasons, (A) is good enough to (B)'. (B) is usually some suggestion, invitation, or expression of determination.

Examples

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    飛行機代(ひこうきだい)(やす)ことだし天気(てんき)いいから沖縄(おきなわ)()こう

    Since plane tickets are cheap and the weather is nice, let's go to Okinawa.

    割引(わりびき)クーポンあることだし明日(あした)映画(えいが)一緒(いっしょ)()に行かない

    I also have discount coupons, so why don't we go watch a movie together tomorrow?

    もう(よる)()てくることだし今日(きょう)パーティこれ(ひら)きにしよう

    It's getting late, so let's call it a night with this!

    風邪(かぜ)()いていることだし今日(きょう)くらいは(なに)もしないでゆっくり(やす)んだら?

    Since you have caught a cold, at least for today, how about you rest without doing anything?

    彼女(かのじょ)のことだし、きっと(つぎ)試合(しあい)には()わたし(しん)ている

    Knowing her, I am convinced that she will surely win the next match.

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