| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [adj] for [verb] | 618 |
|
| 2 | is [adj] [prep] maintain | 31 |
|
| 3 | is [adj] [prep] maintain | 31 |
|
| 4 | [be] [adj] for maintain | 28 |
|
| 5 | be [adj] for maintain | 28 |
|
| 6 | [is] [adj] for maintain | 14 |
|
| 7 | is [adj] for maintain | 13 |
|
