| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] be extend to | 137 |
|
| 2 | [modal v] be extend to | 137 |
|
| 3 | [modal v] be extended to | 136 |
|
| 4 | should be extend to | 31 |
|
| 5 | should be extend to | 31 |
|
| 6 | can be extend to | 29 |
|
| 7 | can be extend to | 29 |
|
| 8 | could be extend to | 23 |
|
| 9 | could be extend to | 23 |
|
| 10 | will be extend to | 22 |
|
| 11 | will be extend to | 21 |
|
| 12 | may be extend to | 12 |
|
| 13 | may be extend to | 12 |
|
| 14 | would be extend to | 9 |
|
| 15 | would be extend to | 9 |
|
| 16 | might be extend to | 8 |
|
| 17 | might be extend to | 8 |
|
