Summary 1. Partial negation all both, every+ not 2. Full negation no none of the ., neither + n. Both books are not suitable 这两台设备的质量都不好。Summary 1. Partial negation all [both, every] + not 2. Full negation no [none of the …, neither ]+ n. Both books are not suitable. 这两台设备的质量都不好