| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] be essential for | 142 |
|
| 2 | [noun sg] is essential for | 113 |
|
| 3 | [noun sg] [is] essential for | 113 |
|
| 4 | [noun sg] [was/were] essential for | 17 |
|
| 5 | [noun sg] was essential for | 13 |
|
| 6 | [noun sg] [am/are] essential for | 12 |
|
| 7 | [noun sg] are essential for | 12 |
|
