Infinitive: to keep a stiff upper lip
Participle: kept a stiff upper lip
Gerund: keeping a stiff upper lip
| I | keep a stiff upper lip |
| you | keep a stiff upper lip |
| he;she;it | keeps a stiff upper lip |
| we | keep a stiff upper lip |
| you | keep a stiff upper lip |
| they | keep a stiff upper lip |
| I | have kept a stiff upper lip |
| you | have kept a stiff upper lip |
| he;she;it | has kept a stiff upper lip |
| we | have kept a stiff upper lip |
| you | have kept a stiff upper lip |
| they | have kept a stiff upper lip |
| I | kept a stiff upper lip |
| you | kept a stiff upper lip |
| he;she;it | kept a stiff upper lip |
| we | kept a stiff upper lip |
| you | kept a stiff upper lip |
| they | kept a stiff upper lip |
| I | had kept a stiff upper lip |
| you | had kept a stiff upper lip |
| he;she;it | had kept a stiff upper lip |
| we | had kept a stiff upper lip |
| you | had kept a stiff upper lip |
| they | had kept a stiff upper lip |
| I | will keep a stiff upper lip |
| you | will keep a stiff upper lip |
| he;she;it | will keep a stiff upper lip |
| we | will keep a stiff upper lip |
| you | will keep a stiff upper lip |
| they | will keep a stiff upper lip |
| I | will have kept a stiff upper lip |
| you | will have kept a stiff upper lip |
| he;she;it | will have kept a stiff upper lip |
| we | will have kept a stiff upper lip |
| you | will have kept a stiff upper lip |
| they | will have kept a stiff upper lip |
| I | keep a stiff upper lip |
| you | keep a stiff upper lip |
| he;she;it | keep a stiff upper lip |
| we | keep a stiff upper lip |
| you | keep a stiff upper lip |
| they | keep a stiff upper lip |
| I | have kept a stiff upper lip |
| you | have kept a stiff upper lip |
| he;she;it | have kept a stiff upper lip |
| we | have kept a stiff upper lip |
| you | have kept a stiff upper lip |
| they | have kept a stiff upper lip |
| I | kept a stiff upper lip |
| you | kept a stiff upper lip |
| he;she;it | kept a stiff upper lip |
| we | kept a stiff upper lip |
| you | kept a stiff upper lip |
| they | kept a stiff upper lip |
| I | had kept a stiff upper lip |
| you | had kept a stiff upper lip |
| he;she;it | had kept a stiff upper lip |
| we | had kept a stiff upper lip |
| you | had kept a stiff upper lip |
| they | had kept a stiff upper lip |
| I | would keep a stiff upper lip |
| you | would keep a stiff upper lip |
| he;she;it | would keep a stiff upper lip |
| we | would keep a stiff upper lip |
| you | would keep a stiff upper lip |
| they | would keep a stiff upper lip |
| I | would have kept a stiff upper lip |
| you | would have kept a stiff upper lip |
| he;she;it | would have kept a stiff upper lip |
| we | would have kept a stiff upper lip |
| you | would have kept a stiff upper lip |
| they | would have kept a stiff upper lip |
| you | keep a stiff upper lip |
| we | Let's keep a stiff upper lip |
| you | keep a stiff upper lip |
| I | am keeping a stiff upper lip |
| you | are keeping a stiff upper lip |
| he;she;it | is keeping a stiff upper lip |
| we | are keeping a stiff upper lip |
| you | are keeping a stiff upper lip |
| they | are keeping a stiff upper lip |
| I | have been keeping a stiff upper lip |
| you | have been keeping a stiff upper lip |
| he;she;it | has been keeping a stiff upper lip |
| we | have been keeping a stiff upper lip |
| you | have been keeping a stiff upper lip |
| they | have been keeping a stiff upper lip |
| I | was keeping a stiff upper lip |
| you | were keeping a stiff upper lip |
| he;she;it | was keeping a stiff upper lip |
| we | were keeping a stiff upper lip |
| you | were keeping a stiff upper lip |
| they | were keeping a stiff upper lip |
| I | had been keeping a stiff upper lip |
| you | had been keeping a stiff upper lip |
| he;she;it | had been keeping a stiff upper lip |
| we | had been keeping a stiff upper lip |
| you | had been keeping a stiff upper lip |
| they | had been keeping a stiff upper lip |
| I | will be keeping a stiff upper lip |
| you | will be keeping a stiff upper lip |
| he;she;it | will be keeping a stiff upper lip |
| we | will be keeping a stiff upper lip |
| you | will be keeping a stiff upper lip |
| they | will be keeping a stiff upper lip |
| I | will have been keeping a stiff upper lip |
| you | will have been keeping a stiff upper lip |
| he;she;it | will have been keeping a stiff upper lip |
| we | will have been keeping a stiff upper lip |
| you | will have been keeping a stiff upper lip |
| they | will have been keeping a stiff upper lip |
| I | would be keeping a stiff upper lip |
| you | would be keeping a stiff upper lip |
| he;she;it | would be keeping a stiff upper lip |
| we | would be keeping a stiff upper lip |
| you | would be keeping a stiff upper lip |
| they | would be keeping a stiff upper lip |
| I | would have been keeping a stiff upper lip |
| you | would have been keeping a stiff upper lip |
| he;she;it | would have been keeping a stiff upper lip |
| we | would have been keeping a stiff upper lip |
| you | would have been keeping a stiff upper lip |
| they | would have been keeping a stiff upper lip |
"The word prob. belongs primarily to the vulgar and non-literary stratum of the language; but it comes up suddenly into literary use c.1000, and that in many senses, indicating considerable previous development." [OED]Meaning "financially support and privately control" (usually in ref. to mistresses) is from 1560. The noun meaning "innermost stronghold of a tower" is from 1586, perhaps a translation of It. tenazza, with a notion of "that which keeps" (someone or something); the sense of "food required to keep a person or animal" is attested from 1801. Keepsake is first recorded 1790, on model of namesake; thus an object kept for the sake of the giver. For keeps "completely, for good" is Amer.Eng. colloquial, from 1861. Keeper "one who has charge of some person or thing, warden" is from c.1300; sense of "one who carries on some business" is from c.1440.