Present Simple: Acciones habituales (always, usually, often, sometimes, occasionally, never). Present Continuous: Cosas que suceden mientras se habla (at the moment, now, today). Past Simple: (yesterday, last week, when, two days ago). Past Continuous: (while, as in that moment, when). Perfect: (never, since, yet, just, already). Be Going To: (plans, intentions y predicciones evidentes). Be + ING: (ho spas certisim, in October). Will + INF: (ofrecimientos, preguntas).
Who, Which, Where, When, Whose, Why
Should: (consejo, debes). Must: (obligación personal). Mustn't: (no está permitido). Have To: (tienes que, regla). Don't Have To / Needn't: (no es necesario).
So: tan, así que, por lo que. So That: de modo que, para que. For Example: por ejemplo....