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