| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must be [verb] on | 278 |
|
| 2 | must [be] [verb] on | 278 |
|
| 3 | must [be] [verb] on | 278 |
|
| 4 | must [be] [vb pp] on | 262 |
|
| 5 | must [be] based on | 55 |
|
| 6 | must [be] base on | 55 |
|
| 7 | must [be] made on | 28 |
|
| 8 | must [be] make on | 28 |
|
| 9 | must [be] served on | 16 |
|
| 10 | must [be] serve on | 16 |
|
| 11 | must [be] [v-ing] on | 15 |
|
| 12 | must [be] founded on | 10 |
|
| 13 | must [be] found on | 10 |
|
| 14 | must [be] placed on | 10 |
|
| 15 | must [be] place on | 10 |
|
| 16 | must [be] spent on | 8 |
|
| 17 | must [be] spend on | 8 |
|
| 18 | must [be] considered on | 7 |
|
| 19 | must [be] consider on | 7 |
|
| 20 | must [be] put on | 6 |
|
| 21 | must [be] put on | 6 |
|
| 22 | must [be] enter on | 5 |
|
| 23 | must [be] kept on | 5 |
|
| 24 | must [be] pay on | 5 |
|
| 25 | must [be] entered on | 5 |
|
| 26 | must [be] leave on | 5 |
|
| 27 | must [be] judged on | 5 |
|
| 28 | must [be] judge on | 5 |
|
| 29 | must [be] left on | 5 |
|
| 30 | must [be] keep on | 5 |
|
