| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [am/are] sure you must [verb] | 8 |
|
| 2 | be sure you must [verb] | 8 |
|
| 3 | [be] sure you must [verb] | 8 |
|
| 4 | 'm sure you must [verb] | 7 |
|
