| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been operate [prep] | 63 |
|
| 2 | have be operating [prep] | 50 |
|
| 3 | has be operate [prep] | 26 |
|
| 4 | have be operate [prep] | 17 |
|
| 5 | have be operate in | 17 |
|
| 6 | have be operate for | 15 |
|
| 7 | had be operate [prep] | 13 |
|
| 8 | have be operated [prep] | 13 |
|
| 9 | have be operate since | 6 |
|
| 10 | have be operate by | 6 |
|
| 11 | have be operate on | 5 |
|
