such a thing
Tiene que estar loco para hacer semejante cosa.
He must be crazy to do such a thing.
Alguien sabio nunca haría semejante cosa.
No wise person would ever do such a thing.
Tendría que estar loco para esperar semejante cosa.
I’d have to be crazy to expect such a thing.
Ella no debería haber hecho semejante cosa.
She shouldn't have done such a thing.
Debe estar loco para decir semejante cosa.
He must be crazy to say such a thing.
Sería tonto, por no decir loco, hacer semejante cosa.
It would be foolish, not to say crazy, to do such a thing.