it is not allowed to do something(不允許做某事)
Doing(something) is strictly forbidden(嚴格禁止做某事)
To do something is not allowed (forbidden)。(做某事是不允許的)
不允許做某事還有如下方式表達:
No Doing (something),例如:
No Parking (禁止停車),
No Smoking (禁止抽菸)
No Swimming (禁止游泳)
表示不被允許做某事的英文可以是: be not allowed to do sth, be not permitted to do sth等。