suspect可数吗

　　Doctors suspect he may have a heart condition.

　　医生怀疑他可能有心脏病。

　　I suspect there may be something funny going on.

　　我怀疑可能有某种非法勾当在进行中。

　　After hours of questioning, the suspect confessed.

　　经过数小时的审问后，嫌疑犯终于招供。