| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have to | 20805 |
|
| 2 | had to | 6114 |
|
| 3 | have to | 5074 |
|
| 4 | has to | 4745 |
|
| 5 | have to | 4018 |
|
| 6 | had to | 458 |
|
| 7 | having to | 224 |
|
| 8 | to have to | 139 |
|
| 9 | 've to | 14 |
|
| 10 | 'd to | 12 |
|
| 11 | 's to | 5 |
|
