| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | there have to be | 461 |
|
| 2 | [ex0] have to be | 461 |
|
| 3 | [ex0] have to be | 461 |
|
| 4 | [ex0] has to be | 255 |
|
| 5 | [ex0] had to be | 159 |
|
| 6 | [ex0] have to be | 47 |
|
