❶堅い
the hard ground
♔基本the hard ground
堅い地面
⦣ hard＋名詞.
The ground is hard.
♔基本The ground is hard.
地面は堅い.
⦣ be動詞＋hard.
It is as hard as rock.
It is as hard as rock.
それは石のように堅い.
My chair is hard. Yours is soft.
反対語My chair is hard. Yours is soft.
私の椅子いすは堅い. 君の（椅子）はやわらかい.
Iron is harder than gold.
Iron is harder than gold.
鉄は金よりも堅かたい.
Diamond is the hardest of all gems.
Diamond is the hardest of all gems.
ダイヤモンドはすべての宝石の中で一番堅かたい.
❷難しい, 困難な difficult
a hard problem
a hard problem
難しい問題
a hard job
a hard job
骨の折れる仕事
My grandmother is hard of hearing.
My grandmother is hard of hearing.
うちの祖母は耳が遠い.
That question is hard to answer.
That question is hard to answer.
その質問は答えるのが難しい.
⦣ 不定詞 to answer は hard を修飾しゅうしょくする. to❾の④
It is hard to ride a bike up the hill.
It is hard to ride a bike up the hill.
自転車に乗ってあの丘おかを登るのは難しい.
⦣ It＝to ride 以下.
