Comparison of words from American Language Corpus
| Could | Should | Would | |
| BE | 107 | 119 | 163 |
| HAVE | 62 | 55 | 109 |
| THAT | 59 | 54 | 89 |
| NOT | 58 | 39 | 51 |
| HE | 59 | 16 | 60 |
| I | 48 | 23 | 63 |
| YOU | 58 | 35 | 41 |
| IT | 36 | 21 | 72 |
| THEY | 39 | 35 | 39 |
| THINK | 16 | 34 | 37 |
| SAY | 22 | 16 | 47 |
| WE | 33 | 37 | 13 |
| IF | 39 | 0 | 40 |
| DO | 36 | 17 | 24 |
| WHAT | 19 | 19 | 37 |
| BEEN | 18 | 17 | 39 |
| SAID | 12 | 15 | 47 |
| GO | 23 | 19 | 30 |
| HOW | 30 | 14 | 27 |
| TAKE | 20 | 20 | 30 |
| NEVER | 19 | 14 | 31 |
| SEE | 43 | 0 | 21 |
| SHE | 34 | 0 | 30 |
| MAKE | 23 | 12 | 28 |
| THOUGHT | 14 | 9 | 37 |
| LIKE | 0 | 0 | 57 |
| DONE | 19 | 18 | 13 |
| GIVE | 13 | 11 | 25 |
| WHETHER | 11 | 21 | 17 |
| HELP | 20 | 9 | 19 |
| BETTER | 16 | 8 | 23 |
| HAPPEN | 17 | 9 | 21 |
| WHICH | 21 | 0 | 26 |
| ANY | 17 | 11 | 18 |
| COME | 13 | 8 | 25 |
| HIM | 21 | 0 | 25 |
| MORE | 14 | 11 | 17 |
| BELIEVE | 16 | 12 | 13 |
| GET | 30 | 11 | 0 |
| ABLE | 0 | 19 | 21 |
| FIND | 23 | 0 | 16 |
| SO | 31 | 8 | 0 |
| NO | 15 | 8 | 15 |
| ANYONE | 14 | 10 | 13 |
| ASK | 12 | 11 | 13 |
| THEM | 15 | 0 | 19 |
| TO | 0 | 0 | 34 |
| WHY | 0 | 34 | 0 |
| LEAD | 19 | 0 | 13 |
| MEAN | 15 | 0 | 17 |
| TELL | 23 | 9 | 0 |
| KNEW | 11 | 0 | 20 |
| BECOME | 14 | 0 | 16 |
| PERHAPS | 14 | 16 | 0 |
| BRING | 14 | 0 | 15 |
| CONSIDER | 0 | 13 | 16 |
| FEEL | 16 | 13 | 0 |
| ME | 11 | 0 | 18 |
| PROBABLY | 0 | 0 | 29 |
| WISH | 16 | 0 | 13 |
| IMAGINE | 14 | 0 | 14 |
| ONLY | 28 | 0 | 0 |
| MAYBE | 12 | 15 | 0 |
| SOON | 12 | 0 | 15 |
| CONTINUE | 0 | 9 | 17 |
| GOVERNMENT | 0 | 11 | 15 |
| MOVE | 12 | 0 | 14 |
| PAY | 0 | 12 | 14 |
| EASILY | 25 | 0 | 0 |
| LOSE | 11 | 0 | 14 |
| REMAIN | 0 | 10 | 15 |
| THIS | 11 | 14 | 0 |
| LEAVE | 0 | 9 | 15 |
| HEAR | 23 | 0 | 0 |
| SOMETHING | 13 | 10 | 0 |
| WOULD | 0 | 0 | 23 |
| HOPED | 0 | 0 | 22 |
| SUCH | 0 | 8 | 14 |
| AFFORD | 21 | 0 | 0 |
| BUT | 21 | 0 | 0 |
| EXPECT | 0 | 0 | 21 |
| FOLLOW | 0 | 9 | 12 |
| NOTHING | 21 | 0 | 0 |
| THEN | 0 | 0 | 21 |
| CERTAINLY | 0 | 0 | 20 |
| HARDLY | 20 | 0 | 0 |
| POSSIBLY | 20 | 0 | 0 |
| PREFER | 0 | 0 | 20 |
| PUT | 11 | 9 | 0 |
| USE | 12 | 8 | 0 |
| ALLOW | 0 | 0 | 19 |
| OTHERWISE | 0 | 0 | 18 |
| RATHER | 0 | 0 | 18 |
| ALLOWED | 0 | 17 | 0 |
| ANYTHING | 17 | 0 | 0 |
| COST | 0 | 0 | 17 |
| AGREE | 0 | 0 | 16 |
| AS | 16 | 0 | 0 |
| BEFORE | 16 | 0 | 0 |
| COULD | 16 | 0 | 0 |
| EVEN | 16 | 0 | 0 |
| NORMALLY | 0 | 0 | 16 |
| PROVE | 16 | 0 | 0 |
| SEEM | 0 | 0 | 16 |
| LOVE | 0 | 0 | 15 |
| NICE | 0 | 0 | 15 |
| SUGGEST | 0 | 0 | 15 |
| WIN | 15 | 0 | 0 |
| WITHOUT | 15 | 0 | 0 |