chalk
chalk — noun
1. a soft, light-coloured natural stone that was formed from the shells of tiny sea
a soft, light-coloured natural stone that was formed from the shells of tiny sea creatures over millions of years and is used in making cement and as a writing material
The white cliffs along the southern coast of England are made of chalk.
collocation: chalk cliffs / chalk coast
Farmers sometimes add crushed chalk to their fields to reduce the acidity of the soil.
add crushed chalk to soil
Chalk forms when tiny seashells settle on the ocean floor over millions of years.
The artist mixed powdered chalk with water to make a simple white paint.
2. a short stick of white or coloured material that people rub against a blackboard
a short stick of white or coloured material that people rub against a blackboard or pavement to leave a visible mark
The teacher picked up a piece of chalk and wrote the answer on the blackboard.
piece of chalk
Leila drew a colourful rainbow on the pavement using bright sticks of coloured chalk.
coloured chalk / sticks of chalk
A box of white chalk sat on the shelf right next to the blackboard.
Ravi wiped the chalk dust off his hands before opening the classroom door.
The children used yellow chalk to draw a large sun on the playground floor.
用法筆記
When used as a countable noun (a chalk, two chalks), the word refers to individual sticks used for writing. The uncountable use refers to the material in general.
常見錯誤
chalk — verb
1. to write, draw, or mark something on a hard surface using a stick of chalk
to write, draw, or mark something on a hard surface using a stick of chalk
Theo chalked the day's specials on the board outside the café.
The coach chalked a small arrow on the pavement to show the running route.
chalked + arrow + on + surface
Yara chalked a hopscotch grid on the path so the younger children could play.
The librarian chalked the return dates on a small blackboard near the front desk.
文法句型
chalk + noun phrase + on/onto + surface
用法筆記
The surface written on is typically introduced by the preposition 'on' or 'onto' after the direct object.