
Regular verb: knock - knocked - knocked
| Present | Present continuous | Preterite | Preterite continuous | 
| I knock you knock he knocks we knock you knock they knock | I'm knocking you're knocking he's knocking we're knocking you're knocking they're 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've knocked you've knocked he's knocked we've knocked you've knocked they've knocked | I've been knocking you've been knocking he's been knocking we've been knocking you've been knocking they've been knocking | I'd knocked you'd knocked he'd knocked we'd knocked you'd knocked they'd knocked | I'd been knocking you'd been knocking he'd been knocking we'd been knocking you'd been knocking they'd been knocking | 
| Future | Future continuous | Future perfect | Future perfect continuous | 
| I'll knock you'll knock he'll knock we'll knock you'll knock they'll knock | I'll be knocking you'll be knocking he'll be knocking we'll be knocking you'll be knocking they'll be knocking | I'll have knocked you'll have knocked he'll have knocked we'll have knocked you'll have knocked they'll have knocked | I'll have been knocking you'll have been knocking he'll have been knocking we'll have been knocking you'll have been knocking they'll have been knocking | 
| Present | Present continuous | Past | Past continuous | 
| I'd knock you'd knock he'd knock we'd knock you'd knock they'd knock | I'd be knocking you'd be knocking he'd be knocking we'd be knocking you'd be knocking they'd be knocking | I'd have knocked you'd have knocked he'd have knocked we'd have knocked you'd have knocked they'd have knocked | I'd have been knocking you'd have been knocking he'd have been knocking we'd have been knocking you'd have been knocking they'd have been knocking | 
| Infinitive | Imperative | 
| Infinitive | Imperative | ||
| to knock | knock Let's knock knock | 
| Present | Past | ||
| knocking | knocked |