contribuísteis

"Contribuísteis" is the second-person plural imperfect indicative form of the verb "contribuir" in Spanish. The verb "contribuir" generally means to contribute, to help, or to add to something. Therefore, "contribuísteis" translates to "you all contributed" or "you all used to contribute" or "you all were contributing," depending on the specific context and nuance intended.

This form is primarily used in Spain, where the "vosotros" (you all) form is common in informal and sometimes formal speech. In most of Latin America, the equivalent expression would use the third-person plural form "contribuyeron" with the pronoun "ustedes" (you all). The imperfect tense "contribuísteis" suggests an ongoing or habitual action in the past, or a past action that was in progress when another event occurred. For instance, one might say "Vosotros contribuísteis mucho a la causa" (You all contributed a lot to the cause), implying a past action. Or, "Mientras yo hablaba, vosotros contribuísteis con ideas valiosas" (While I was speaking, you all were contributing valuable ideas).