| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [to-vb] [conj] [art] | 11679 |
|
| 2 | [to-vb] [conj] maintain | 191 |
|
| 3 | [conj] maintain [art] | 86 |
|
| 4 | [to-vb] maintain [art] | 15 |
|
