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| Vista previa | Fecha de publicación | Título | Autor(es) |
 | - | Present Continuous for future arrangements | Ramírez Bautista, Jabel |
 | - | Present continuous for future plans | Hernández González, Esteban Vicente |
 | - | Present continuous passive | Felipe Florido, J. Jesús |
 | 6-sep-2019 | Present continuous passive | Felipe Florido, J. Jesús |
 | - | Present continuous: affirmative, negative and interrogative form (first part) | Escalona Picazo, Marco Antonio |
 | - | Present continuous: affirmative, negative and interrogative form (second part) | Reyes Alonso, Rommel Alejandro |
 | 1-sep-2017 | Present continuous: affirmative, negative and interrogative form (second part) | Reyes Alonso, Rommel Alejandro |
 | - | Present continuous: affirmative, negative and interrogative forms | Coria Galindo, Concepción Haydeé |
 | 6-sep-2019 | Present continuous: affirmative, negative and interrogative forms | Coria Galindo, Concepción Haydeé |
 | 6-sep-2019 | Present perfect continuous | Godina Sepúlveda, Karina |
 | 6-sep-2019 | Present perfect continuous | Montaño Morales, Guillermina |
 | - | Present perfect continuous | Godina Sepúlveda, Karina |
 | - | Present perfect continuous | Montaño Morales, Guillermina |
 | - | Present Perfect forms: affirmative, negative, interrogative (part one) | De León González, Guillermo |
 | 6-sep-2019 | Present Perfect Forms: affirmative, negative, interrogative. (First part) | De León González, Guillermo |
 | - | Present Perfect Simple: Affirmative, Negative & Interrogative Structures | Aguilar Angulo, Paula I. |
 | 6-sep-2019 | Present Perfect Tense - Interrogative form | Coordinación de Universidad Abierta, Innovación Educativa y Educación a Distancia, UNAM |
 | 6-sep-2019 | Present Perfect Tense - Negative form | Coordinación de Universidad Abierta, Innovación Educativa y Educación a Distancia, UNAM |
 | 6-sep-2019 | Present Perfect: Affirmative, Negative & Interrogative Structures | Hernández González, Esteban Vicente |
 | - | Present Perfect: Affirmative, Negative & Interrogative Structures | Hernández González, Esteban Vicente |
