| No. | | | | |
|---|---|---|---|---|
| (17) | | never to be | to be unreal (false) | - |
| (18) | | once; sometimes,with plural | - | to be characterised; feature (n.) |
| (19) | | to exist at an unspecified orarbitrary time | to be uncertain, questionable (be possible) | to be vague, to lack character (indefinable) |
| (20) | | to endure, continueto be | be true, right | expansion, similarity, namely, also |