| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [be] sure that | 134 |
|
| 2 | [vb past] [prep] [be] sure | 61 |
|
| 3 | [vb past] [prep] [be] that | 52 |
|
| 4 | [vb past] [prep] sure that | 6 |
|
