We’ve arranged to have a picnic next weekend. (ARE) We________________next weekend.
We ARE HAVING A PICNIC next weekend.
It’s the first time Jim has travelled by plane. (NEVER) Jim ________________ before.
Jim HAS NEVER TRAVELLED BY PLANE before.
It wasn't necessary for me to buy tickets for the concert. (NEED) I ______________tickets for the concert.
I DIDN'T NEED TO BUY tickets for the concert.