
Irregular verb: cost - cost - cost
| Present | Present continuous | Preterite | Preterite continuous | 
| I cost you cost he costs we cost you cost they cost | I'm costing you're costing he's costing we're costing you're costing they're costing | I cost you cost he cost we cost you cost they cost | I was costing you were costing he was costing we were costing you were costing they were costing | 
| Present perfect | Present perfect continuous | Pluperfect | Pluperfect continuous | 
| I've cost you've cost he's cost we've cost you've cost they've cost | I've been costing you've been costing he's been costing we've been costing you've been costing they've been costing | I'd cost you'd cost he'd cost we'd cost you'd cost they'd cost | I'd been costing you'd been costing he'd been costing we'd been costing you'd been costing they'd been costing | 
| Future | Future continuous | Future perfect | Future perfect continuous | 
| I'll cost you'll cost he'll cost we'll cost you'll cost they'll cost | I'll be costing you'll be costing he'll be costing we'll be costing you'll be costing they'll be costing | I'll have cost you'll have cost he'll have cost we'll have cost you'll have cost they'll have cost | I'll have been costing you'll have been costing he'll have been costing we'll have been costing you'll have been costing they'll have been costing | 
| Present | Present continuous | Past | Past continuous | 
| I'd cost you'd cost he'd cost we'd cost you'd cost they'd cost | I'd be costing you'd be costing he'd be costing we'd be costing you'd be costing they'd be costing | I'd have cost you'd have cost he'd have cost we'd have cost you'd have cost they'd have cost | I'd have been costing you'd have been costing he'd have been costing we'd have been costing you'd have been costing they'd have been costing | 
| Infinitive | Imperative | 
| Infinitive | Imperative | ||
| to cost | cost Let's cost cost | 
| Present | Past | ||
| costing | cost |