叉子拿在左手，刀子拿在右手。

The fork is held in your left hand and the knife in your right.

他用刀子切了一个苹果。

He used a knife to cut an apple.

他从抽屉里拿出了一把刀子。

He took a knife out of the drawer.

他用刀子镂空了一个南瓜。

He used a knife to hollow out a pumpkin.

用刀子使书页不再粘连。

Use a knife to unstick the pages of the book.

用刀子刮掉墙上的油漆。

Use a knife to scrape the paint off the wall.

小心刀子，否则你可能会流血。

Be careful with the knife, or you might bleed.

使用砧板时要小心刀子。

Be careful with the knife when using the chopping board.

如果你不把刀子擦干，它会生锈。

If you don't dry the knife properly, it will rust.

请小心使用刀子，不要切到手。

Please be careful with the knife, don't cut your hand.