1. He pretended not to know about it.该句是否可说成:He pretended that he doesn't know about it.2. He pretended don't know about it.这句话错在有 pretend、do 两个动词了,所以错吗?关于否定的基本概念有些模糊。
...experiences gained in the operation and use this to improve its work.该处的experience很明显是作“经验”意义,应为不可数名词。 二,By Wednesday, hundreds of thousands of military personnel had been mobilized to take part in flood control and aid operations in 17 provincial...