She cannot but laugh.

Source: Tatoeba

I could hardly keep from laughing.

Source: Tatoeba

He couldn't hold his temper any longer.

He could no longer contain his anger.

Source: Tatoeba

I could not help laughing at his haircut.

Source: Tatoeba

I cannot forbear expressing my doubts.

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When I thought of that, I couldn’t help smiling.

Source: Tatoeba

Upon seeing how ridiculous he looked, everyone could not help but laughing.

Source: Tatoeba

When she began to stutter, her classmates couldn't help laughing.

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The workers complained when their working hours were extended.

Source: Tatoeba

She was a tiny girl, but she really held her own on the baritone sax. Nonetheless, I couldn't help but imagine the thing wrapping itself around her and devouring her like a boa constrictor.

Source: Tatoeba