英语前缀在什么时候重读,什么时候不重读,有什么规律没答:a'bout, be'lieve, ad'dress, de'cide, re'port, con'demn, res'pect, com'pare, in'form, dis'cuss, im'press, mis'take, en'force, pre'pare, em'ploy, per'mit, es'cape, pro'duce, ex'claim,trans'late c)有 de-, in-, re-, con-, pre- 等前缀的重音与词义和词类...