| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they have had [verb] | 160 |
|
| 2 | they have had [to-vb] | 154 |
|
| 3 | [pron] have had to wait | 22 |
|
| 4 | they have [vb pp] to wait | 7 |
|
| 5 | they have [verb] to wait | 7 |
|
| 6 | they have have to wait | 5 |
|
| 7 | they [verb] had to wait | 5 |
|
| 8 | they have had wait | 5 |
|
