| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [adj] [prep] [verb] | 2604 |
|
| 2 | is [adj] [prep] [v-ing] | 2535 |
|
| 3 | be [adj] [prep] maintaining | 75 |
|
| 4 | [be] [adj] [prep] maintaining | 75 |
|
| 5 | [is] [adj] [prep] maintaining | 32 |
|
| 6 | is [adj] [prep] maintain | 31 |
|
