- An object blocking light causes a shadow
- If an object is in the light then that object is blocking the light
- Hence, if an object is in the light then the object will cause a shadow

- If an object is in the light then the object will cause a shadow
- Sunlight is a kind of light
- Hence, if an object is in the sunlight then the object will cause a shadow

- If an object is in the sunlight then the object will cause a shadow
- A boy is a kind of object
- Hence, if a boy is in the sunlight then the boy will cause a shadow

- If a boy is in the sunlight then the boy will cause a shadow
- A boy stands in the sunlight
- Therefore, the boy in the sunlight will cause a shadow

- The boy in the sunlight will cause a shadow
- Shadow of an object can be seen by eyes
- Therefore, the boy can see his shadow in the sunlight

Hence, the boy can see his shadow in the sunlight
Question
When a boy stands in a field in the sunlight, he usually is able to see his

Context
- A boy stands in the sunlight 
- An object blocking light causes a shadow 
- Sunlight is a kind of light 
- If an object is in the light then that object is blocking the light 
- A boy is a kind of object 
- Shadow of an object can be seen by eyes