| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | he must have be [v-ing] [prep] | 21 |
|
| 2 | he must have be [v-ing] [prep] | 21 |
|
| 3 | he must have been [v-ing] [prep] | 21 |
|
| 4 | he must have be [v-ing] on | 7 |
|
| 5 | he must have be [v-ing] on | 7 |
|
| 6 | he must have be [v-ing] in | 5 |
|
| 7 | he must have be [v-ing] in | 5 |
|
