| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] look forward to | 39 |
|
| 2 | had look forward to | 26 |
|
| 3 | [vb past] looked forward to | 25 |
|
| 4 | [vb past] to look forward to | 14 |
|
| 5 | began look forward to | 5 |
|
