| Be true | 7 |
| Be turned on to | 15 |
| Be twice as awful? | 18 |
| Be ultimately | 13 |
| Be unable to come in, say | 25 |
| Be unable to decide | 19 |
| Be unable to function without | 29 |
| Be unable to get the rest? | 26 |
| Be unable to let go | 19 |
| Be unable to remember | 21 |
| Be unable to share | 18 |
| Be unable to sit | 16 |
| Be unable to stand | 18 |
| Be unacquainted with | 20 |
| Be unanimous | 12 |
| Be unaware of imminent danger | 29 |
| Be unceremoniously dismissed | 28 |
| Be uncertain | 12 |
| Be uncharitable, in a way | 25 |
| Be uncivilly disobedient | 24 |
| Be uncontrolled | 15 |
| Be uncooperative | 16 |
| Be uncooperative, in a way | 26 |
| Be undaunted after an earthquake | 32 |
| Be undecided | 12 |
| Be undecided, as an issue | 25 |
| Be undecided, as in court | 25 |
| Be undefeated against, in sports lingo | 38 |
| Be under obligation | 19 |
| Be under par | 12 |
| Be under par? | 13 |
| Be under the weather | 20 |
| Be under, as an officer | 23 |
| Be understood | 13 |
| Be undetermined | 15 |
| Be uneconomical | 15 |
| Be unenthusiastic | 17 |
| Be unequivocal about | 20 |
| Be unexpected | 13 |
| Be unexpectedly received, as a deal | 35 |
| Be unfair? | 10 |
| Be unfaithful to | 16 |
| Be unfond of fire? | 18 |
| Be unhelpful | 12 |
| Be unimportant | 14 |
| Be united | 9 |
| Be unlike Peter Pan | 19 |
| Be unmannerly with soup | 23 |
| Be unnatural | 12 |
| Be unrealistically optimistic | 29 |
| Be unresolved | 13 |
| Be unselfish | 12 |
| Be unserious | 12 |
| Be unsettled | 12 |
| Be unsportsmanlike | 18 |
| Be unstable | 11 |
| Be unsteady | 11 |
| Be unstinting | 13 |
| Be unsuccessful | 15 |
| Be unsuited? | 12 |
| Be unsure | 9 |
| Be unswayable | 13 |
| Be unthrifty | 12 |
| Be untrue | 9 |
| Be untrustworthy | 16 |
| Be untruthful | 13 |
| Be untruthful with | 18 |
| Be unused | 9 |
| Be unused for a long time | 25 |
| Be unwanted | 11 |
| Be unwarrantably bold | 21 |
| Be unwell | 9 |
| Be unwilling | 12 |
| Be unwilling to give | 20 |
| Be unwilling, old style | 23 |
| Be up | 5 |
| Be up against | 13 |
| Be up against it | 16 |
| Be up against? | 14 |
| Be up and about | 15 |
| Be up front with it to get a hand | 33 |
| Be up in the air | 16 |
| Be up to snuff | 14 |
| Be up to something | 18 |
| Be up-front | 11 |
| Be upright | 10 |
| Be upset | 8 |
| Be upset by, say | 16 |
| Be upwardly mobile? | 19 |
| Be useful | 9 |
| Be useful to | 12 |
| Be utile | 8 |
| Be utterly awful | 16 |
| Be vain, in a way | 17 |
| Be vainglorious | 15 |
| Be valetudinarian | 17 |
| Be vampiric | 11 |
| Be vanquished | 13 |
| Be venturesome | 14 |
| Be verbally evasive | 19 |