| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [adv] [v-ing] | 34961 |
|
| 2 | but [be] [adv] | 2384 |
|
| 3 | but [adv] [v-ing] | 831 |
|
| 4 | but [be] [v-ing] | 284 |
|
