| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be able to keep [adv prt] [prep] | 16 |
|
| 2 | [be] able to keep [adv prt] [prep] | 16 |
|
| 3 | [be] able to keep [adv prt] [prep] | 8 |
|
| 4 | be able to keep [adv prt] [prep] | 8 |
|
| 5 | able to keep [pers pn] [adv prt] [prep] | 7 |
|
| 6 | able to keep [pron] [adv prt] [prep] | 7 |
|
| 7 | able to keep [adv prt] [prep] [noun] | 6 |
|
