| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] it [adv] [adj] maintain | 9 |
|
| 2 | [verb] [pers pn] [adv] [adj] maintain | 9 |
|
| 3 | [verb] [pron] [adv] [adj] to maintain | 9 |
|
| 4 | [verb] [pron] [adv] [adj] maintain | 9 |
|
| 5 | [verb] it [adv] [adj] maintain | 9 |
|
| 6 | [verb] [pron] [adv] [adj] maintain | 9 |
|
| 7 | [verb] [pron] [adv] difficult maintain | 6 |
|
| 8 | [verb] [pron] [adv] difficult maintain | 6 |
|
| 9 | make [pron] [adv] [adj] maintain | 5 |
|
