Literature review on effect of task types on English vocabulary acquisition

English vocabulary can be seen as an overt manifestation of one's English competence. However, in China, students have a variety of problems in vocabulary acquisition, such as only learning the Chinese meaning of vocabulary without learning its connotation, insufficient vocabulary input. Therefore, in order to solve these problems in students' English vocabulary acquisition, cultivate students' English vocabulary ability and improve the efficiency of English vocabulary learning, the study of vocabulary acquisition has become a hot topic in the field of second language acquisition. This study compares 3 empirical studies and analyzes their differences and similarities in terms of theoretical basis and research design. At last, it also provides references and suggestions for English vocabulary teaching and learning.