| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] been extensively | 113 |
|
| 2 | have been extensively | 113 |
|
| 3 | [vb -s] been extensively | 60 |
|
| 4 | has been extensively | 60 |
|
| 5 | have been extensively | 38 |
|
| 6 | [vb base] been extensively | 38 |
|
| 7 | [adv] been extensively | 11 |
|
| 8 | had been extensively | 10 |
|
| 9 | [vb past] been extensively | 10 |
|
| 10 | [adv] been extensively | 7 |
|
| 11 | been [verb] extensively | 37 |
|
| 12 | been [vb pp] extensively | 37 |
|
| 13 | been use extensively | 21 |
|
| 14 | been used extensively | 21 |
|
| 15 | been [adv] extensively | 13 |
|
| 16 | been [adv] extensively | 13 |
|
| 17 | been most extensively | 5 |
|
| 18 | been most extensively | 5 |
|
| 19 | been extensively [vb pp] | 123 |
|
| 20 | been extensively [verb] | 123 |
|
| 21 | been extensively studied | 14 |
|
| 22 | been extensively study | 14 |
|
| 23 | been extensively used | 13 |
|
| 24 | been extensively use | 13 |
|
| 25 | been extensively investigate | 7 |
|
| 26 | been extensively discussed | 7 |
|
| 27 | been extensively discuss | 7 |
|
| 28 | been extensively investigated | 7 |
|
| 29 | been extensively restored | 6 |
|
| 30 | been extensively restore | 6 |
|
