Second language acquisition English language 7 Study and teaching 4 Code switching (Linguistics) 3 Grammar, Comparative and general 3 Language and languages 3 Corpora (Linguistics) 2 Foreign speakers 2 Interlanguage (Language learning) 2 Research 2 Study and teaching (Primary) 2 Applied linguistics 1 Article 1 Bilingualism 1 Chinese language 1 Collocation (Linguistics) 1 Competence and performance (Linguistics) 1 Contrastive linguistics 1 Discourse analysis 1 Education, Bilingual 1 Language transfer (Language learning) 1 Learning, Psychology of 1 Linguistics 1 Motivation (Psychology) 1 Motivation in education 1 Peer teaching 1 Persian speakers 1 Speech acts (Linguistics) 1 Spoken English 1 Study and teaching (Higher) 1