All but #1 are gramatically correct ways of describing slightly different situations.
In #1, "weighs" is misspelled.
When you say someone is "lifting weight", that does not imply that only one weight is beign lifted.
1-2-3 and 4-5-6 differ in tense. That does not mean one set is correct and the other is not
1. He has lifted weighs on the stage.
2. He has lifted weight on the stage.
3. He has lifted a weight on the stage.
4. He is lifting weights on the stage.
5. He is lifting weight on the stage.
6. He is lifting a weight on the stage.
(Which one is correct?)
1 answer