本项研究通过对15名美国留学生在4个月内做的4次调查,研究初级阶段美国留学生在“吗”字是非问习得中表现出来的特点,发现他们对该问句的语序特点很早就已经习得,对语气词“吗”的习得则表现为一个循序渐进的过程,“肯定+吗”远远先于“否定+吗”习得。在对“吗”字是非问语义特点的习得上则表现出“高疑问句一低疑问句一无疑问句”的次序,美国学生优先发展高疑问句,而汉族儿童优先发展低疑问句。 This study, based on four surveys conducted by 15 American students over a 4-month period, examines the characteristics of American students in non-internship during the initial stage and finds out that the order of their quotation The characteristics have been acquired very early, and the acquisition of the modal particle “?” Appears as a gradual process, “sure + + ” far prior to “negation +? ” Acquisition. In the sequence of non-interrogative semantic features, the American students showed the priority of developing high-question questions while the Han children preferred low-question questions.