A。だって B。

When to use

Defensive/childish "because"; typically used to justify oneself, can sound whiny.

Explanation

The A。だって B。grammar point is used to give a reason, express cause, or introduce a topic in a casual manner. It can be translated as 'because', 'since', or 'it's just that'. A is the reason and B is the statement that follows due to the reason. It can be used with verbs, い-adjectives, な-adjectives, and nouns.

• 暇ひまだって、映画えいがを見に行いこうよ。

  Since we are free, let's go watch a movie.

  Hima datte, eiga wo mi ni ikou yo.

• 寒さむいだって、コートを着きてください。

  Because it's cold, please wear a coat.

  Samui datte, ko-to wo kite kudasai.

• 疲つかれているだって、休やすんだほうがいい。

  Since you're tired, it's better to rest.

  Tsukarete iru datte, yasunda hou ga ii.

• 彼女かのじょが料理上手りょうりじょうずだって、みんな彼女かのじょの作つくった料理りょうりを楽たのしみにしています。

  Because she is good at cooking, everyone is looking forward to her dishes.

  Kanojo ga ryouri jouzu datte, minna kanojo no tsukutta ryouri wo tanoshimi ni shiteimasu.

Causality (Because / Since / Due to)

• ～から、～〜kara、～N5Expresses reason or cause; 'because', 'since', 'so'.
• A。だから、～B。A. Dakara, ~B.N5Express reason or cause; 'because', 'so', 'therefore'.
• ～んだもん〜nda monN3Used to convey a sense of justification; 'because'…
• ～からです〜kara desuN5Express the reason or cause; 'because', 'since', 'due to'.
• ～し、～し、～〜shi, 〜shi, 〜N4Express multiple reasons or characteristics; 'and'…
• ～ことから〜koto karaN2Indicates the reason or basis for something; 'because'…
• ～ものだから〜mono dakaraN2Express the reason or cause for something; 'because'…
• ～ので〜nodeN4Express a reason or a cause for something; 'because'…
• ～なぜなら〜nazenaraN3Express a reason or explanation; 'because', 'the reason is'.
• ～がゆえに～ga yue niN1Expresses the reason or cause; 'because', 'due to', 'as a…
• ～こととて〜koto toteN1Used to express the reason or premise for a decision or…
• ～がゆえの Noun〜ga yue no NounN1Expresses the reason or cause for something; 'because of'…
• ～おかげで〜okagedeN3Expresses gratitude or shows a positive result due to a…
• ～ばかりに〜bakari niN2Express an undesired situation or result caused by…
• ～せいで〜sei deN3Indicates that something or someone caused an unfortunate…
• ～あまり〜amariN2Expresses the result of doing something excessively or…
• ～とあって〜to atteN1Expresses a special situation or event due to certain…

Compare when to use each