| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [verb] [prep] a considerable time | 6 |
|
| 2 | be [verb] [prep] a considerable time | 6 |
|
| 3 | [vb mod] [verb] [prep] a considerable time | 5 |
|
| 4 | [modal v] [verb] [prep] a considerable time | 5 |
|
