Depreciation Timeframe for first time investor

[Joel Duby]

Probably dumbest question ever. Say you purchase a rental in November 2022 and have tenants immediately. Can write off depreciation for the full amount in that year? Second question. Say I want to build a house intended use airbnb. Buy property this spring 2023, building takes place all summer and fall into winter. Completes in spring 2024. Can I write if depreciation for house in 2023 even if it's had no tenants?