I really enjoyed the lesson. It flew by so quickly.
The lesson was so much fun it was over before I knew it.
I had so much fun I forgot about the time.
[時間が経つのを忘れるほど](https://eikaiwa.dmm.com/uknow/questions/49939/)楽しかった。
上記の例は一般的に使える表現ですが、レッスン後に講師に楽しさを伝えたい場合は、下記の表現がよりナチュラルです。
I really enjoyed the lesson. It flew by so quickly.
レッスンが楽しくて、[あっという間に](https://eikaiwa.dmm.com/uknow/questions/28690/)終わりました。
The lesson was so much fun it was over before I knew it.
楽しすぎて、[気づいたら](https://eikaiwa.dmm.com/uknow/questions/31283/)レッスンが終わっていました！
Something being "over before I knew it" is an every day idiom used to describe time passing quickly and not noticing it. We use it in formal and informal situations to show that we did not notice the time passing by and us forgetting about it because we were having so much fun.
"over before I knew it" とは、[時間が過ぎるのが早くて](https://eikaiwa.dmm.com/uknow/questions/45623/)、気づかない様子を表すイディオムです。とても[楽しすぎて](https://eikaiwa.dmm.com/uknow/questions/2724/)、時間が過ぎるのに気が付かなかったことを伝える、フォーマルにもカジュアルにも使うことのできるフレーズです。
楽しい時間は飛ぶように過ぎ去る、というような意味です。
このような"you"の使い方はすごく英語的な表現なのでついでに慣れてしまうと
いいと思います。いわゆる二人称の"you"ではなく、一般的な人を指す"you"です。
「どうして夕飯までに帰って来れなかったの？」みたいに怒られてしまったような
シチュエーションを考えると、次の言い方もできますね。
I had so much fun (that) I forgot what time it was/forgot about time/it was dark before I knew it.
楽しすぎて、時間を気にしてなかった/時間を忘れちゃった/気付いたらもう暗かった。
"what time was it"としないように注意です。
否定形のときに語順をひっくり返してします間違いは、英語を母国語とする人でも意外とやっちゃいます。
I enjoyed the lesson so much, I did not realize the time.
The lesson went so quickly because I was enjoying it so much.
"Time flies when your having fun."
Is an English saying the explains when you are enjoying yourself time seems to go very quickly.
"I enjoyed the lesson so much."
Tells the teacher that you really enjoyed the lesson.
"I didn't realize the time." explains that you were not watching the time and it seemed to pass quickly.
"The lesson went so quickly." expresses the lesson felt very short.
"Because." is fallowed by the reason for the lesson feeling so short.
"I was enjoying it so much." tells the teacher that you enjoyed the lesson.
"Time flies when your having fun."
（楽しい時間はあっという間に過ぎる）
楽しんでいると時間がとても速く過ぎるようであることを説明する英語のことわざです
"I enjoyed the lesson so much."
（レッスンがとても楽しかったです）
先生にレッスンをとても楽しんだことを伝える表現です。
"I didn't realize the time."
（時間に気付きませんでした）
時間を見ていなかったけれど早く過ぎたようであることを説明する表現です。
"The lesson went so quickly."
（レッスンがとても早く終わりました）
レッスンがとても短く感じたことを表します。
"Because"の後に、レッスンがとても短く感じたことの理由を続けます。
"I was enjoying it so much."
（とても楽しかった）
レッスンを楽しんだことを先生に伝えます。.
2. I enjoyed that lesson so much and the time just went so fast!
1. When you enjoy something a lot there is a tendency for time to pass quickly. A very normal expression - although something of a cliche, is: Time flies quickly when you're having fun!"
2. This expression is very similar to the first but in plainer language.
"While working in the garden I couldn't believe the time went so fast!"
1. 何か楽しいことをしている時は時間が過ぎるのが早いものです。1はすごくよく使われる表現です。ちょっとありきたりだけど。
: Time flies quickly when you're having fun!"
2. この表現は一番と似ていますが、もっと簡単な言葉です。
例："While working in the garden I couldn't believe the time went so fast!"
I enjoyed the lesson so much that I forgot about the time.
I had so much fun in the lesson that I didn't realize the time went by.
1. I enjoyed the lesson so much that I forgot about the time.
This means that you had so much fun in the store that you didn't realize the time went.
2. I had so much fun in the lesson that I didn't realize the time went by.
The fun means "excitement", "pleasure" "entertainment" "amusement" If you had fun in the class it means that you enjoyed it a lot, you had a lot of pleasure in the lesson, and you were amused and entertained, and you were not paying attention to the time.
1. I enjoyed the lesson so much that I forgot about the time.
レッスンがすごく楽しかったので、時間を忘れてしまいました。
これは、楽しすぎて、時間が経っていたことに気づかなかったという意味です。
2. I had so much fun in the lesson that I didn't realize the time went by.
レッスンが楽しかったので、時間が過ぎるのに気が付きませんでした。
fun とは 楽しい、わくわくするという意味の、"excitement", "pleasure" "entertainment" "amusement"と同じ意味です。レッスンが楽しかったということは、楽しすぎて、時間を気にしていなかったということです。
The lesson was so much fun that I lost track of the time.
I didn't realize time was gone because I was enjoying the lesson so much.
Time flies when you are having fun' is commonly said when someone has been enjoying .doing something and lost track of the time in the process.
To 'lose track of the time' is to not notice just how quickly time has gone by.
So, you may say:
Time flies when you are having fun.
or
The lesson was so much fun that I lost track of the time.
or
I didn't realize time was gone because I was enjoying the lesson so much.
Time flies when you are having fun'
楽しいときは時間が経つのが早い。
これは、何かが楽しすぎて、時間を忘れてしまうという意味です。
'lose track of the time'とは、時間が早く過ぎるのに気が付かないという意味です。
例：
Time flies when you are having fun.
楽しいときは時間があっという間に過ぎます。
The lesson was so much fun that I lost track of the time.
レッスンが楽しすぎて、どのくらい時間がたったのかわからなくなった。
I didn't realize time was gone because I was enjoying the lesson so much.
レッスンがすごく楽しくて、時間が経っていたのに気が付かなかった。
Wow, time really does fly when you have fun! Our time went by so fast!
If you would like to tell someone that you had a good time and that the time went by quickly, you can say something like “The lesson was so fun I lost track of time!” or “Wow, time really does fly when you have fun! Our time went by so fast!”. This will tell someone that you had a very good time with them.
時間があっという間に過ぎるほど楽しかったことを伝えるときのフレーズです。
“The lesson was so fun I lost track of time!”
（レッスンがとても楽しくて何時かわからなかった。）
“Wow, time really does fly when you have fun! Our time went by so fast!”
（わぁ、楽しいと時間があっという間ですね！時間があっという間に経ってしまいました！）
これは相手にとても楽しかったことを伝えることができます。
"I had so much fun in today's lesson, time flew by!"
"Today's lesson was so fun that I forgot about the time"
"Time really does fly when you're having fun"
If you wanted to express that an online English lesson was so fun that you forgot about the time, you could say any of the following: "I had so much fun in today's lesson, time flew by!", "Today's lesson was so fun that I forgot about the time" or "Time really does fly when you're having fun".
オンライン英会話のレッスンが「時間を忘れるくらい楽しかった」ときは、次のように言えます。
"I had so much fun in today's lesson, time flew by!"（今日のレッスンはとても楽しかったです。あっという間でした）
"Today's lesson was so fun that I forgot about the time"（今日のレッスンはとても楽しくて、時間があっという間でした）
"Time really does fly when you're having fun"（楽しい時間は本当にあっという間ですね）
I had a great time in the lesson that I lost track of time
The lesson was so much fun I lost track of time
I really enjoyed the lesson so much that I forgot about the time
When you want to express to your tutor that you enjoyed the lesson so much that you forgot about the time, then you may say it in the following ways:
-I had a great time in the lesson that I lost track of time
-The lesson was so much fun I lost track of time
-I really enjoyed the lesson so much that I forgot about the time
先生に、レッスンがとても楽しくて時間を忘れてしまったことを伝えたいときのフレーズです。
-I had a great time in the lesson that I lost track of time
（レッスンが楽しくて、時間がわからなくなりました。）
-The lesson was so much fun I lost track of time
（レッスンがとても楽しくて、時間がわからなくなりました。）
-I really enjoyed the lesson so much that I forgot about the time
（レッスンがとても楽しくて時間を忘れてしまいました。）
I had so much fun that it went by really quickly.
楽し過ぎて一瞬でした。
他には：
Wow! Time flies when you're having fun!
わあ！楽しんでる時は時間が経つのは一瞬ですね！
It was so much fun I forgot about the time.
楽し過ぎて時間のことを忘れました！
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