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to alter - modifier  changer  décaler  trafiquer  
 
Conjugations of the English verb alter can be found below. To conjugate any other English or French verb you can use the verb2verbe engine in the left-hand column. To help you learn this verb you should test yourself on its conjugation. Do this by clicking on the orange test button above.
Indicative
Present Perfect
I alter              
you alter              
she alters            
we alter              
they alter              
I have altered     
you have altered     
she has altered     
we have altered     
they have altered     
Past Pluperfect
I altered          
you altered          
she altered          
we altered          
they altered          
I had altered     
you had altered     
she had altered     
we had altered     
they had altered     
Future Future perfect
I will alter       
you will alter       
she will alter       
we will alter       
they will alter       
I will have altered
you will have altered
she will have altered
we will have altered
they will have altered
Imperative
Present    
alter!                  
let's alter!        
 
 
Conditional
Present Perfect
I would alter       
you would alter       
she would alter       
we would alter       
they would alter       
I would have altered
you would have altered
she would have altered
we would have altered
they would have altered
Conjunctive
Present Perfect
I alter              
you alter              
she alter              
we alter              
they alter              
I have altered     
you have altered     
she have altered     
we have altered     
they have altered     
Past   Pluperfect  
I altered          
you altered          
she altered          
we altered          
they altered          
I had altered     
you had altered     
she had altered     
we had altered     
they had altered     
Participle
Gerund Past
altering            
altered