| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could be think [prep] | 16 |
|
| 2 | could [be] think [prep] | 16 |
|
| 3 | could [be] think of | 13 |
|
| 4 | could [be] thought [prep] | 13 |
|
| 5 | could [be] think of | 13 |
|
