Present perfect vs past simple

The present perfect and past simple are both used to talk about actions that happened in the past, but they are used in different contexts. Here’s the difference:

1. Present Perfect:
   • Structure: have/has + past participle.
   • Usage: It connects the past with the present. We use it when the exact time of the action is not important or not mentioned, and we often focus on the result or experience.
   • Example: I have visited London. (The exact time is not mentioned, and it might be relevant to the present.)

1. Past Simple:
   • Structure: verb in the past tense.
   • Usage: It is used for actions that happened at a specific time in the past. The action is finished and not connected to the present.
   • Example: I visited London last year. (The action is completed and is tied to a specific time in the past.)

In summary:

• Present perfect is used when the exact time isn’t important or you’re still feeling the effects of the action.
• Past simple is used when the action is finished and you know exactly when it happened.