English Nation - Present Perfect Or Past Simple You must always use the Present perfect when the time of an action is not important or not specified. You must always use the
![MODAL VERBS CHARACTERISTICS They are auxiliary verbs. To form the negative we add not. They have the same form for all the persons. They are followed by. - ppt download MODAL VERBS CHARACTERISTICS They are auxiliary verbs. To form the negative we add not. They have the same form for all the persons. They are followed by. - ppt download](https://images.slideplayer.com/26/8744192/slides/slide_7.jpg)
MODAL VERBS CHARACTERISTICS They are auxiliary verbs. To form the negative we add not. They have the same form for all the persons. They are followed by. - ppt download
![Past Simple (Pasado simple) & Past contiuous (Pasado continuo) - Idioma | Regular verbs, Irregular past tense verbs, Simple past verbs Past Simple (Pasado simple) & Past contiuous (Pasado continuo) - Idioma | Regular verbs, Irregular past tense verbs, Simple past verbs](https://i.pinimg.com/736x/81/6e/4f/816e4f6ef90d1575026bb8ac1725d176.jpg)