I remembered that some people get sick when the air is thin, but I had heard that even elementary school kids can climb Mt. Fuji, so I figured it would be fine.
「〜ように言う」 is used to report the content of a command, prohibition, instruction, or advice, such as "do ...," "don't do ...," "please do ...," or "you'd better do ...".
「〜と、…」 is used when you notice something you had not been aware of before. It is often used for unexpected discoveries, and because it describes something you "noticed," the sentence usually ends in the past tense.
Connection Vる + と
Examples
気がつくと、外はすっかり暗くなっていた。
When I noticed, it had already gotten completely dark outside.
待ち合わせの場所に着くと、友だちはもう来ていた。
When I arrived at the meeting place, my friend was already there.
昔住んでいたところに行ってみると、大きいビルが建っていた。
When I went to the place where I used to live, a large building had been built there.
国から届いた荷物を開けると、大好きなお菓子が入っていた。
When I opened the package from my hometown, it contained my favorite sweets.
Plus〜たら★★
「〜たら」にも同じ使い方がある。
「〜たら」 can be used in the same way.
屋上に上がったら、東京スカイツリーが見えた。
When I went up to the rooftop, I could see Tokyo Skytree.
発車のベルが鳴っているので飛び乗ったら、反対方向の電車だった。
I heard the departure bell and jumped on, but it was a train going in the opposite direction.
就職試験の結果の連絡だと思って急いで電話に出たら、間違い電話だった。
I thought it was a call about my job interview results and answered it in a hurry, but it was a wrong number.
「〜ほど…」 is used to show that the state or degree of "..." is extraordinary, by giving an example of 「〜」, as in 「歩けないほど強い風」 (a wind so strong that you can't walk).
Connection Vる/Vない/いA/N + ほど *「Vますたい」も使われることがある。
Examples
富士山に登って、下りてきたときは、もう一歩も歩けないほど疲れていた。
When I came down after climbing Mt. Fuji, I was so tired that I couldn't take another step.
あの双子は両親も間違えるほどよく似ている。
Those twins look so alike that even their parents mix them up.
年末は、猫の手も借りたいほど忙しくなる。
At the end of the year, we get so busy that we would take help from anyone.
ランチタイムのレストランは、目が回るほど忙しい。
The restaurant at lunchtime is so busy that it makes your head spin.
今週中にやらなければならない仕事が山ほどある。
I have a mountain of work that has to be done within this week.
「〜ていく」 is used when moving away while doing an action, as in 「歩いていく」 (to walk there), or when doing an action and then going on to the next place, as in 「買っていく」 (to buy something and take it along). It is also used to talk about something continuing on into the future.
Connection Vて + いく
Examples
冬になると渡り鳥は南のほうへ飛んでいく。
When winter comes, migratory birds fly off toward the south.
A:もしもし、今からそっちへ行くけど、何か買っていこうか。 B:じゃ、ジュース買ってきて。
A: Hello, I'm on my way over to your place now. Shall I pick up something? B: Then please get some juice.
これからも日本語の勉強を続けていくつもりです。
I intend to keep on studying Japanese from now on.
これから、日本の会社でも外国人社員は増えていくと思います。
I think the number of foreign employees will keep increasing in Japanese companies from now on.