| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could be [vb pp] [prep] [adj] | 1413 |
|
| 2 | be [vb pp] [adv prt] [prep] [adj] | 1356 |
|
| 3 | could be [vb pp] [adv prt] [prep] | 388 |
|
| 4 | could be [adv prt] [prep] [adj] | 30 |
|
