| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must have be [adj] [prep] | 217 |
|
| 2 | must have be [v-ing] [prep] | 80 |
|
| 3 | must have be [v-ing] [adj] | 21 |
|
| 4 | must be [v-ing] [adj] [prep] | 14 |
|
| 5 | have be [v-ing] [adj] [prep] | 13 |
|
