replace,是一人动词,可直接作谓语. The boss left for Beijing,so he replace his position. instead of 是否定后在的词,instead 是否定前面的,两者都不能作谓语,instead应该放在后面. He comes from China instead of English.他来自中国而不是来自英国. He didn't go to the cinema,he go to the park,instead.他没有去电影院,而是去了公园....
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