| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [verb] for several months | 16 |
|
| 2 | [be] [verb] for several months | 16 |
|
| 3 | [be] [vb pp] for several months | 13 |
|
| 4 | [been] [verb] for several months | 6 |
|
| 5 | been [verb] for several months | 6 |
|
| 6 | [be] [verb] for several months | 5 |
|
| 7 | be [verb] for several months | 5 |
|
