| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | but [ex0] must have be | 16 |
|
| 2 | but [ex0] must have [be] | 16 |
|
| 3 | but [ex0] must have [be] | 16 |
|
| 4 | but [ex0] must have [be] | 16 |
|
| 5 | but there must have [be] | 16 |
|
| 6 | but [ex0] must have been | 16 |
|
| 7 | but [ex0] must have [been] | 16 |
|
