Question

1) Mother looks very tired. (Change into Future Continuous Tense)
2) Birds fly in the air. (Change into Simple Past Tense)
3) I believe on kind and honest people. (Change into Present Perfect)
4) He has attended class to achieve his target. (Make it Past Perfect)
5) They have been staying in U.K ( Change into Simple Future)​

Answer 1

Mother will be looking tired
Birds flew in air
He had attended his classes to achieve his target
They will stay in UK