| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must have been [prep] | 294 |
|
| 2 | must have be [prep] | 289 |
|
| 3 | must have be in | 89 |
|
| 4 | must have be like | 42 |
|
| 5 | must have be at | 40 |
|
| 6 | must have be on | 20 |
|
| 7 | must have be for | 14 |
|
| 8 | must have be about | 10 |
|
| 9 | must have be to | 8 |
|
| 10 | must have be with | 7 |
|
| 11 | must have be worth | 6 |
|
| 12 | must have be within | 5 |
|
| 13 | must 've be [prep] | 5 |
|
| 14 | must have be of | 5 |
|
| 15 | must have be from | 5 |
|
| 16 | must have be near | 5 |
|
| 17 | must have be among | 5 |
|
