| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [adj] [to-vb] [conj] [verb] | 276 |
|
| 2 | is [adj] [to-vb] [conj] [vb infin] | 185 |
|
| 3 | [be] [adj] [to-vb] [conj] maintain | 14 |
|
| 4 | be [adj] [to-vb] [conj] maintain | 14 |
|
| 5 | is [adj] [to-vb] [conj] maintain | 7 |
|
| 6 | [is] [adj] [to-vb] [conj] maintain | 6 |
|
| 7 | is [adj] [verb] [conj] maintain | 6 |
|
| 8 | is [adj] [to-vb] [conj] maintain | 6 |
|
