
Regular verb: sightsee - sightseed - sightseed
| Present | Present continuous | Preterite | Preterite continuous | 
| I sightsee you sightsee he sightsees we sightsee you sightsee they sightsee | I'm sightseeing you're sightseeing he's sightseeing we're sightseeing you're sightseeing they're sightseeing | I sightseed you sightseed he sightseed we sightseed you sightseed they sightseed | I was sightseeing you were sightseeing he was sightseeing we were sightseeing you were sightseeing they were sightseeing | 
| Present perfect | Present perfect continuous | Pluperfect | Pluperfect continuous | 
| I've sightseed you've sightseed he's sightseed we've sightseed you've sightseed they've sightseed | I've been sightseeing you've been sightseeing he's been sightseeing we've been sightseeing you've been sightseeing they've been sightseeing | I'd sightseed you'd sightseed he'd sightseed we'd sightseed you'd sightseed they'd sightseed | I'd been sightseeing you'd been sightseeing he'd been sightseeing we'd been sightseeing you'd been sightseeing they'd been sightseeing | 
| Future | Future continuous | Future perfect | Future perfect continuous | 
| I'll sightsee you'll sightsee he'll sightsee we'll sightsee you'll sightsee they'll sightsee | I'll be sightseeing you'll be sightseeing he'll be sightseeing we'll be sightseeing you'll be sightseeing they'll be sightseeing | I'll have sightseed you'll have sightseed he'll have sightseed we'll have sightseed you'll have sightseed they'll have sightseed | I'll have been sightseeing you'll have been sightseeing he'll have been sightseeing we'll have been sightseeing you'll have been sightseeing they'll have been sightseeing | 
| Present | Present continuous | Past | Past continuous | 
| I'd sightsee you'd sightsee he'd sightsee we'd sightsee you'd sightsee they'd sightsee | I'd be sightseeing you'd be sightseeing he'd be sightseeing we'd be sightseeing you'd be sightseeing they'd be sightseeing | I'd have sightseed you'd have sightseed he'd have sightseed we'd have sightseed you'd have sightseed they'd have sightseed | I'd have been sightseeing you'd have been sightseeing he'd have been sightseeing we'd have been sightseeing you'd have been sightseeing they'd have been sightseeing | 
| Infinitive | Imperative | 
| Infinitive | Imperative | ||
| to sightsee | sightsee Let's sightsee sightsee | 
| Present | Past | ||
| sightseeing | sightseed |