be careful not to fall down vs be careful to not to fall down

Examples:

• Be careful not to fall down the stairs.
• She told him to be careful not to fall down the slippery slope.
• I always remind my kids to be careful not to fall down when they are playing outside.
• The sign said, "Be careful not to fall down the cliff."
• He warned her to be careful not to fall down the ladder.

Alternatives:

• Be cautious not to fall down
• Make sure not to fall down
• Take care not to fall down
• Watch out not to fall down
• Be mindful not to fall down

Examples:

• Be careful to not to fall down the stairs.
• She reminded him to be careful to not to fall down the slippery slope.
• I always tell my kids to be careful to not to fall down when they are playing outside.
• The sign said, "Be careful to not to fall down the cliff."
• He advised her to be careful to not to fall down the ladder.

Alternatives:

• Be cautious to not to fall down
• Make sure to not to fall down
• Take care to not to fall down
• Watch out to not to fall down
• Be mindful to not to fall down