English Presentation

I have to perform presentation in English tomorrow.

It's only 5 minute presentation, but I needed about a week to prepare it.

And actually, the preparation hasn't be finished yet, so I will work until late at night.

However, really scary thing is question-and-answer session after presentation.

I'm worried about whether I could catch and understand questions.

• I have to perform presentation in English tomorrow.
• This sentence is perfect! No correction needed!

• It's only 5 minute presentation, but I needed about a week to prepare it.
• It's only a 5 minute presentation, but I needed about a week to prepare it.

• And actually, the preparation hasn't be finished yet, so I will work until late at night.
• And actually, the preparation hasn't been finished yet, so I will work until late at night.

• However, really scary thing is question-and-answer session after presentation.
• However, the really scary thing is the question-and-answer session after presentation.

• I'm worried about whether I could catch and understand questions.
• I'm worried about whether I can catch and understand questions.

You need to use the Future Tense :))

• I have to perform presentation in English tomorrow.
• I have to perform a presentation in English tomorrow.

• It's only 5 minute presentation, but I needed about a week to prepare it.
• It's only a 5 minute presentation, so i only needed about a week to prepare for it.

• And actually, the preparation hasn't be finished yet, so I will work until late at night.
• And actually, the preparation hasn't be finished yet, so I will work until late at night.

  instead of preparation it would sound better if you said "and actually, the presentation is not finished yet..." :)

• However, really scary thing is question-and-answer session after presentation.
• However, the really scary thing is the question-and-answer session after the presentation.