Kindly check these sentences

1. What would have been the scene, if Mr. David has witnessed this all today?

2. I serious think that the goals are unrealistic to achieve. But even it’s true that nothing is impossible.

3. Had you informed me earlier, I would have attended the seminar, it would have helped me to understand the basics in-depth.

Creativeguru

1. What would have been the scene, if Mr. David has had witnessed this all day today?

2. I serious seriously think that the goals are unrealistic to achieve. But even Still, it’s true that nothing is impossible.

3. Had you informed me earlier, I would have attended the seminar . , it It would have helped me to understand the basics in-depth in depth.