2. Have you ever flew on a plain? no, i haven`t.
3. have you ever seen an elephant in real life? yes, i have.
4. have you ever gone to a concert? yes, i have.
5. have you ever traveled on a train? yes, i have.
6. have you ever built a snowman before? yes, i have.
7. have you ever been on TV? no, i haven`t.