
Regular verb: complain - complained - complained
| Present | Present continuous | Preterite | Preterite continuous | 
| I complain you complain he complains we complain you complain they complain | I am complaining you are complaining he is complaining we are complaining you are complaining they are complaining | I complained you complained he complained we complained you complained they complained | I was complaining you were complaining he was complaining we were complaining you were complaining they were complaining | 
| Present perfect | Present perfect continuous | Pluperfect | Pluperfect continuous | 
| I have complained you have complained he has complained we have complained you have complained they have complained | I have been complaining you have been complaining he has been complaining we have been complaining you have been complaining they have been complaining | I had complained you had complained he had complained we had complained you had complained they had complained | I had been complaining you had been complaining he had been complaining we had been complaining you had been complaining they had been complaining | 
| Future | Future continuous | Future perfect | Future perfect continuous | 
| I will complain you will complain he will complain we will complain you will complain they will complain | I will be complaining you will be complaining he will be complaining we will be complaining you will be complaining they will be complaining | I will have complained you will have complained he will have complained we will have complained you will have complained they will have complained | I will have been complaining you will have been complaining he will have been complaining we will have been complaining you will have been complaining they will have been complaining | 
| Present | Present continuous | Past | Past continuous | 
| I would complain you would complain he would complain we would complain you would complain they would complain | I would be complaining you would be complaining he would be complaining we would be complaining you would be complaining they would be complaining | I would have complained you would have complained he would have complained we would have complained you would have complained they would have complained | I would have been complaining you would have been complaining he would have been complaining we would have been complaining you would have been complaining they would have been complaining | 
| Infinitive | Imperative | 
| Infinitive | Imperative | ||
| to complain | complain Let's complain complain | 
| Present | Past | ||
| complaining | complained |