| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] therefore [adj] [to-vb] | 260 |
|
| 2 | [is] [adv] able [to-vb] | 247 |
|
| 3 | [be] therefore able [to-vb] | 34 |
|
| 4 | [is] therefore able [verb] | 11 |
|
