| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [adv] [vb pp] to [be] | 692 |
|
| 2 | is [adv] [vb pp] to [be] | 542 |
|
| 3 | [be] often [vb pp] to [be] | 79 |
|
| 4 | be often [vb pp] to [be] | 79 |
|
| 5 | [is] often [vb pp] to [be] | 50 |
|
| 6 | is often [vb pp] to [be] | 50 |
|
| 7 | is often [vb pp] [prep] [be] | 50 |
|
| 8 | is often [vb pp] to [be] | 50 |
|
| 9 | is often [verb] to [be] | 50 |
|
