"Ați spălat podeaua?"
Translation:Did you wash the floor?
You wish, buddy! :) The tense introduced here is the compound perfect. It is used to show a past action considered completed at the moment of speaking. This is the tense used most frequently to express a completed past action. Example: "eu am lucrat", I (have) worked
There is also the simple perfect, which indicates a past accomplished action. This tense is not frequent in standard speech. (The general tendency is to use the compound perfect to express a past action that is perceived as completed at the moment of speaking. Simple perfect is still actively used in current speech in the south-western part of Romania, especially in Oltenia, but also in Banat and in western Muntenia, mostly in rural areas.) Example: "eu lucrai", I (have) worked.
There is also the imperfect indicative, generally used to indicate an action or a state in the past which is perceived as progressive (thus the imperfect is the tense of story-telling), continuing, repeated or habitual. Example: "eu lucram", I worked.
And then there is the pluperfect, e.g. "eu lucrasem", I had worked.
Those are the past tenses of Romanian.