| INDICATIVE |  | 
|  Present |  | 
I quack   You quack   He/She/It quacks   We quack   You quack   They quack  
  |  Yo  
  | 
|  Imperfect |  | 
I was quacking   You were quacking   He/She/It was quacking   We were quacking   You were quacking   They were quacking  
  |   | 
|  Perfect |  | 
I quacked   You quacked   He/She/It quacked   We quacked   You quacked   They quacked  
  |   | 
|  Perfect |  | 
I have quacked   You have quacked   He/She/It has quacked   We have quacked   You have quacked   They have quacked  
  |   | 
|  PlusPerfect |  | 
I had quacked   You had quacked   He/She/It had quacked   We had quacked   You had quacked   They had quacked  
  |   | 
|  Plusperfect |  | 
I had quacked   You had quacked   He/She/It had quacked   We had quacked   You had quacked   They had quacked  
  |   | 
|  Future |  | 
I will quack   You will quack   He/She/It will quack   We will quack   You will quack   They will quack  
  |   | 
|  Future perfect |  | 
I will have quacked   You will have quacked   He/She/It will have quacked   We will have quacked   You will have quacked   They will have quacked  
  |   | 
| SUBJUNTIVE |  | 
|  Present |  | 
I (that )may quack   You (that )may quack   He/She/It (that )may quack   We (that )may quack   You (that )may quack   They (that )may quack  
  |   | 
|  Imperfect |  | 
I (that )might quack   You (that )might quack   He/She/It (that )might quack   We (that )might quack   You (that )might quack   They (that )might quack  
  |   | 
|  Perfect |  | 
I (whether) quacked   You (whether) quacked   He/She/It (whether) quacked   We (whether) quacked   You (whether) quacked   They (whether) quacked  
  |   | 
|  Pluperfect |  | 
I (whether) had quacked   You (whether) had quacked   He/She/It (whether) had quacked   We (whether) had quacked   You (whether) had quacked   They (whether) had quacked  
  |   | 
| CONDITIONAL |  | 
|  Present |  | 
I would quack   You would quack   He/She/It would quack   We would quack   You would quack   They would quack  
  |  Yo  
  | 
|  Perfect |  | 
I would have quacked   You would have quacked   He/She/It would have quacked   We would have quacked   You would have quacked   They would have quacked  
  |  Yo  
  | 
| IMPERATIVE |  | 
|  Present |  | 
let me quack   quack   let him quack   let us quack   quack   let them quack  
  |   | 
| PARTICIPLE |  | 
|  Present |  | 
quacking  
  |   | 
|  Perfect |  | 
quacked  
  |   | 
| INFINITIVE |  | 
|  Present |  | 
to quack  
  |   | 
|  Perfect |  | 
have quacked  
  |   | 
| GERUND |  | 
|  Present |  | 
quacking  
  |   | 
|  Perfect |  | 
having quacked  
  |   
  |