1. You state that you feel much better than before.
2. To be on the mend = To be improving.
"After her operation, Sarah is now on the mend."
3. On the road to recovery = recovering; getting better; improving.
"It's been two weeks since her surgery, and she is on the road to recovery."
1. 前と比べてずっとよくなっていることを表します。
2. To be on the mend = To be improving.（よくなってきている、改善されてきている）
"After her operation, Sarah is now on the mend." 手術後、サラはよくなってきている。
3. On the road to recovery = recovering; getting better; improving. （回復してきている、よくなってきている）
"It's been two weeks since her surgery, and she is on the road to recovery."
手術から二週間、彼女は回復傾向にある。
"I feel much better than before."
This means that you have recovered since the last time you would have spoken to your friend and you're feeling better.
"I'm in a better state than before."
state : the particular condition that someone or something is in at a specific time.
e.g I was in a bad state last Spring when I got the flu.
"I'm almost as good as new."
To almost be as good as new is to be in a very good condition or state; close to the original state again after damage, injury, or illness.
You can also say :
" I am in much better shape now.
"I feel much better than before."前よりも全然いいよ
その友達と前回話した時よりも回復しているという意味。
"I'm in a better state than before."前よりもいい状態にあるよ。
state特定の状態。
例 I was in a bad state last Spring when I got the flu.昨春は風邪をひいて最悪の状態だった。
"I'm almost as good as new."ほぼ新品同様にいいよ。
To almost be as good as newはとてもいい状態という意味。 けがや病気などのダメージから元の状態に戻ること。
" I am in much better shape now.私は今は前よりもっといい状態だね。
To express that one is feeling better than they did previously they say the following;
I feel rejuvenated.
keyword: rejuvenated-feeling renewed.
I feel much better than I did previously.
keyword: previously- prior to, earlier
I feel I've recovered from my cold.
keyword: recover-to get better
One may also simply say. I am much better than I was the last time we spoke.
「以前よりも体調が良くなった」は、以下のように表せます：
I feel rejuvenated.
（元気になりました）
キーワード: rejuvenated-元気を回復した
I feel much better than I did previously.
（だいぶ良くなりました）
キーワード: previously- ～よりも前に（prior to）、前に
I feel I've recovered from my cold.
（風邪は良くなったと思います）
キーワード: recover-良くなる
またシンプルに：
I am much better than I was the last time we spoke.
（前話した時よりもだいぶ良くなりました）
↑と言うこともできます。
"I am feeling much better than before." will put across to someone that you have gotten better from your cold, since the last time you talked to them, but are still a little sick.
"I am feeling much better than before."
（前よりはずっと良くなりました）
-前に話した時よりも風邪は良くなったけど、まだ完全ではないという意味です。
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