| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have had to wait | 48 |
|
| 2 | [vb base] had to wait | 18 |
|
| 3 | have had to wait | 13 |
|
| 4 | [vb infin] had to wait | 12 |
|
| 5 | have had to wait | 12 |
|
| 6 | [vb past] had to wait | 11 |
|
| 7 | had had to wait | 10 |
|
| 8 | [vb -s] had to wait | 7 |
|
| 9 | has had to wait | 6 |
|
| 10 | 've had to wait | 5 |
|
