| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] be [adv prt] [prep] | 1803 |
|
| 2 | could be [adv] [prep] | 204 |
|
| 3 | could be [adv prt] [prep] | 130 |
|
| 4 | could be [adv prt] [prep] | 130 |
|
| 5 | could [be] [adv prt] [prep] | 130 |
|
| 6 | could [be] [adv prt] [prep] | 130 |
|
