Tongue (4) Lengua (4) Estudio (4) Preposición (3) Labor (2) Writing (2) Research (2) Grammar, Comparative and general--Prepositions (2) Investigación (2) Trabajo (2) Escritura (2) concurrence (2) Language (1) Time (1) Reading comprehension (1) Perspective (1) Nature (1) Methodology (1) Metalanguage (1) Measurement (1) Memory (1) Linguistics (1) Language and languages (1) Impact (1) Id (Psychology) (1) Errors (1) Error analysis (Mathematics) (1) Error (1) Difference (Psychology) (1) Design (1)