| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have to be careful | 94 |
|
| 2 | have to be careful | 40 |
|
| 3 | had to be careful | 37 |
|
| 4 | has to be careful | 12 |
|
| 5 | to have to be careful | 5 |
|
