if・with
since・because
Structure
- Verb[ て ] + は / ちゃ
- いAdj[ て ] + は
- なAdj + では / じゃ
- Noun + では / じゃ
[if/ when + negative expectation・negative comment・ AてはB、used when the (hypothetical) outcome of an A is expected to be undesirable (B) or to negatively comment (B) about A]