| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [verb] many years | 13 |
|
| 2 | it take many years | 9 |
|
| 3 | it [vb past] many years | 8 |
|
| 4 | it took many years | 6 |
|
| 5 | it [vb -s] many years | 5 |
|
