to have bought this shirt
Vosotros no deberíais haber comprado esta camisa.
You shouldn't have bought this shirt.
Vosotras no deberíais haber comprado esta camisa.
You shouldn't have bought this shirt.
Ustedes no deberían haber comprado esta camisa.
You shouldn’t have bought this shirt.
Tú no deberías haber comprado esta camisa.
You shouldn't have bought this shirt.