We use since to talk about an action from some indicated time in the past, up to the present time. Therefore, the present perfect tense of the verb (e.g. has worked) is required. For refers
We use can or be able to for saying that somebody or something has the ability to do something. We use may or could to talk about the possibility of something in the present or
The present perfect is often used to talk about situations that started in the past and are continuing now. We sometimes use the present perfect in a question with how long to ask about how
When talking about a life experience, we can use the present perfect. We don’t say when it happened because we’re more interested in the experience, than the time or date.
We use the present perfect for: life experiences in the past, recent past actions that are important now, past situations that are still happening now, and to talk about recent events in the past.
We use used to + infinitive to talk about an action that happened regularly in the past but doesn’t happen now. Used to is different to the past simple because it emphasises that the action
We use the present continuous for things that are happening at the time we are speaking, for temporary situations, and for activities that are in progress.