Domestically, most of the previous studies are theoretical researches. Only a few people have made research on Chinese learners 'acquisition of existential sentence.
国内对于存在句的研究大多属于纯理论研究，只有少数学者对中国学习者习得存在句的中介语进行了研究。
2
Leaving speech field out of consideration or not, a sentence meaning includes the theoretical state and the actual state.