have to

入試に頻出だが、これは意外と知らないぞ！【 cannot help ～ing, cannot help ～enough, cannot ～ too …, may(might) well ～, may(might) as well ～, may(might) as well ～ as …, only have to (have only to) 】このような【can, may, have to 】 を使った慣用表現をなめてはいけない！よく整理して、しっかり覚えないと痛い目にあうぞ！