| be on alert(verb, keep, protect, wait, guard) |
| be on guard(verb, see, mind, notice, spot) |
| be on hand(verb, mark, see, note, observe) |
| be on the lookout(verb, keep, protect, wait, guard) |
| be on the scene(verb, mark, see, note, observe) |
| be on to(verb, remove, determine, follow, discover) |
| be present(verb, mark, see, note, observe) |
| be there for(verb, agree, understand, identify, comprehend) |
| be understanding(verb, agree, understand, identify, comprehend) |
| be vigilant(verb, keep, protect, wait, guard) |
| be wary(verb, keep, mind, notice, spot) |
| be watchful(verb, keep, mind, notice, spot) |
| beam(verb, mark, see, note, regard) |
| behold(verb, state, study, mark, see) |
| beware(verb, mind, notice, spot, avoid) |
| bleed for(verb, expression, phrasal verb, agree, understand) |
| care for(verb, expression, phrasal verb, keep, protect) |
| chase(verb, remove, determine, follow, discover) |
| chase down(verb, expression, phrasal verb, determine, follow) |
| clock(verb, time, see, note, catch) |