| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] be due to [adj] | 47 |
|
| 2 | could be [adj] to [adj] | 25 |
|
| 3 | could be [adj] to [adj] | 25 |
|
| 4 | could be due to [adj] | 15 |
|
| 5 | could [be] due to [adj] | 10 |
|
| 6 | could be due to [adj] | 10 |
|
| 7 | could be due [prep] [adj] | 10 |
|
| 8 | could be due [prep] [adj] | 10 |
|
| 9 | could be due to [adj] | 10 |
|
| 10 | could [be] due to [adj] | 10 |
|
| 11 | could be due to [adj] | 10 |
|
