| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | but [subord] it is [verb] | 55 |
|
| 2 | but [subord] it is [vb pp] | 50 |
|
| 3 | but if it is [verb] | 23 |
|
| 4 | but when it is [verb] | 17 |
|
| 5 | but [subord] it is used | 5 |
|
| 6 | but [subord] it is use | 5 |
|
