| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be introduced | 3811 |
|
| 2 | was introduce | 1095 |
|
| 3 | be introduce | 939 |
|
| 4 | been introduce | 625 |
|
| 5 | were introduce | 564 |
|
| 6 | is introduce | 388 |
|
| 7 | are introduce | 292 |
|
| 8 | being introduce | 216 |
|
| 9 | be introducing | 194 |
|
| 10 | be to introduce | 136 |
|
| 11 | 're introduce | 14 |
|
| 12 | 's introduce | 6 |
|
| 13 | am introduce | 6 |
|
| 14 | be introduce | 5 |
|
