1.It is me.
(x)
→It is I. (√)
2.I,you and he
will go to Kolkata tomorrow. (x)
→You,he and I will go to Kolkata tomorrow. (√)
3.You are wiser
than me. (x)
→You are wiser than I. (√)
4.Let her and I
do this work. (x)
→Let her ande me do this work. (√)
5.One should do
his duty. (x)
→One should do one’s duty. (√)
6.Every one
must do their best. (x)