doubtful [ˈdaʊtfʊl] adjective 1. [unlikely] poco probabile 2. [uncertain] incerto ( f incerta) to be doubtful about or of sthg non essere sicuro ( f sicura) di qc 3. [dubious] dubbio ( f dubbia)
Complétez la séquence avec la proposition qui convient. This shirt is dirty, it …. need to wash needs washing needn't wash