know

what has she known?

• she knows martial art

• she has known martial art

• she knows english

she knows about

• languages

• computers

• martial arts

what they have known?

• they know about politics

• they have known about politics

• they are knowing about politics

who do you know?

• i know the manager of the company

• she knows the manager of the company

• they know the manager

where have you known about economic?

• he knows about economic in the college

• she has known about economic in the college

• i have known about economic in the college

martial arts

• 
• 
• 

receptionist

• 
• 
• 

custom agent

• 
• 
• 

secretary

• 
• 
• 

how long has your sister known about computer?

• she has known about martial arts in the school

• she knows martial arts on the street

• she has known about computers since 2013