| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | services have been | 89 |
|
| 2 | services have be | 89 |
|
| 3 | services have [been] | 89 |
|
| 4 | services have [be] | 44 |
|
| 5 | services had [be] | 25 |
|
| 6 | services has [be] | 19 |
|
