Today, I gave a presentation in class.
I forgot my script and had to stop a few times, but I was able to finish it.
I want to do better in my next presentation.
Alternative Version (more natural):
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I gave a presentation in class today.
I forgot some of my script and had to pause a few times, but I still managed to finish.
Next time, I hope to do even better.
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“Do better” is the correct phrase (not “want to better”). Use “was able to” or “managed to” for successful effort. “Still” adds emphasis when something goes wrong but ends well.