だって～

About

Although だって often comes at the end of a sentence, it can also be used at the start of a sentence when the speaker wants to provide and emphasize a reason for feeling X.

When だって is used at the start of a sentence, common translations are "'cause", and "but. This usage of だって can often sound childish or whiny.

E.g. だって足あしが痛いたいもん。 "But my foot hurts."

E.g. 私わたしは行いかない。だって私わたしの元彼もとかれも来くるんでしょ？ "I'm not going. ('Cause) my ex boyfriend is gonna be there right?"

E.g. だって約束やくそくを破やぶったじゃん。 "'Cause they broke their promise."

Summary

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  At the start of a sentence, だって provides and emphasizes a reason for the speaker feeling a certain way

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  Common translations for だって at the start of a sentence are "'cause" and "but"

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  Starting a sentence with だって can sound childish and/or whiny