We use the Present Perfect to:
- talk about experiences:
"I've been to London twice."
- Actions that started in the past and continue in the present:
"I have worked as a teacher for ten years"
- Past actions that have a result in the present:
"She has lost her keys"
| We use ALREADY to talk about an action that has been completed before we expected.
It is normally used in affirmative sentences:
"We have already had lunch"
But it can also be used in interrogative sentences such as:
"Has the class begun?"
Position within the sentence: before the participle.
| We use YET to talk about an action that hasn't been completed, but we expect it to happen. It is used in negative and interrogative sentences:
"Have they arrived yet?"
"She hasn't eaten anything .."
Position within the sentence: at the end of the sentence.
| We use JUST to talk about actions that happened RECENTLY.
"Dan and Kelly have had a baby girl" (it means the baby was born a few days ago)
Position: before the participle. |