"As is", with verbs it is primarily seen in the pattern ～たまま(で). It is used to show action "as is" in a certain state without any change in course or situation. However, it is not necessarily the case that the subject in question is still. However, there is a very similarly meaning particle, なり, that we will learn about later which requires the subject be still. So, this is something to keep in mind.
It is not to say that this word is only used with the past tense, although for this meaning it most certainly is. However, in other usages you may see it used with the negative or demonstratives to show how a state is still the same without there being any change, which is of the same vein as above.
Though not really different in meaning, there is also the pattern ままに which is used to show that one leaves something to the course of a situation or to show things are going as thought. In other words, it shows something being left to a natural course of action. You may see this after verbs in the non-past form and even in the passive. You may also see ～がままに, which is very formal and 書き言葉的. A common phrase utilizing this older grammar is 思うがままに. In more modern Japanese, this would become 思いのままに.
Examples
1. 昔のままの風景だよね。
This scenery is just as it was in the old times, isn't it?
2. そのままにしておいた。
I left it alone the way it was.
3. 何かを生のまま食べたことがありますか。
Have you ever eaten something raw?
4a. 意のままに（思ったように）歌う自由があるよ。
4b. 意のままに（思ったように）歌っていいんだよ。(More common)
I have the freedom to sing at will.
5. 彼は、本能のままに行動しただけです。
He only acted out of instinct.
6. 窓を開けたままにしておいてください。
Please leave the window open.
7. このままでは必ず死んでしまう。
As it is now, we will surely die.
8. 彼女は電気をつけたまま寝ちゃった。(砕けた）
She slept with the lights on.
9. このままお待ち下さい。(On the phone)
Please hold the line.
10. 会議がありますから、椅子はこのままにしておいてください。
There's going to be a meeting, so please leave the chairs the way they are.
11. 着の身着のままで逃げること
Running away with only one's clothes.
12. 自然のままで素敵ですわね。(Very feminine)
It's great keeping it natural.
漢字 Note: まま can be written in 漢字 as either 儘・侭.
Variant/Pronunciation Note: Depending on the speaker, with region being a significant factor, this may also be seen/pronounced as まんま.
ほしいまま, a very important phrase that uses mama that is written in 漢字 as either 恣, 縦, or 擅, means "selfish".
13. 権勢を恣にする。
To exert one's power at will.
14. 世界最高の日本語（の）教授としての名声をほしいままにしてるぞ！
I enjoy the reputation of being the greatest Japanese professor in the world!
～と思いきや is equivalent to either "despite having thought" or "contrary to expectations". Its literal translation is "just as I thought...". Tense is determined by the final verb.
15. あっさり断られると思いきや、彼女は承諾してくれました。
Despite having thought that she would just refuse, she consented to it.
16. このレストランは安いと思いきや、会計は５０００円以上だったよ。
Contrary to thinking that this restaurant was cheap, the bill was over five thousand yen!
17. 彼はもう帰ってきたと思いきや、彼にびっくりした。
Just as I thought he had gone home, I was scared by him.
18. 誰もあの講座に出席しないと思いきや、大勢出席しました。
Despite having thought that no one would attend that lecture, a lot of people attended.
19. 日本はどこに行っても渋滞で遅くなると思いきや、交通はアメリカのように普通だった。
Despite having thought that you would be made to slow down by congestion wherever you go in Japan, the traffic was normal like America.
Definition Note: 思いきや is equivalent to 思っていたところが.
もと may be written in 漢字 in different ways depending on how it is interpreted. You will see this word again in regards to ～をもとにして.
下・許
When written as such, it means "under" in a physical sense. It can also refer to be under rules, forces, etc. のもとで and のもとに are both possible, but the former refers to action/movement whereas the latter refers to existence/static situation. Both expressions are rather literary, but the latter is even more so.
20. 行政の保護の下で税を徴収している。
I'm collecting taxes under the protection of the administration.
21. 法の許に
Under the law
22. 勇将の下に弱卒なし。
There are no weak soldiers under a strong/brave general.
23. 長男は親の下を離れた。
The older brother left from under his parents.
24. 厳しい監視の許に置かれるのは｛大変な・酷い｝ことでしょうね。
Being placed under harsh surveillance is awful, isn't it?
25. 販売予想を基にして我々は製品の生産を停止することにしました。
On the basis of the sales forecast, we have decided to halt the manufacturing of the product.
26. 太陽のもとで子供たちが遊んでいる。
Kids are playing under the sun.
27. 街灯のもと｛に・で｝住民たちが集まっている。
Residents are gathering underneath the street light(s).
元・旧・故
When written as such, もと means "former/previous". Lastly, it may be used in two important expressions.
28. 元に戻った方がいい。
It's best to return to the previous condition.
29a. 今日、元同僚と偶然出会いましたよ。
29b. 今日、かつての同僚と偶然会いましたよ。
I happened to meet my former colleague suddenly today.
30. 元の鞘に収まる。(Idiom)
To bury the hatchet.
本・元
| 1. | Origin, source, root |
| 2. | The basis of things, foundation. This usage may also be written in Kanji as 基. |
| 3. | The cause. This usage may also be written in Kanji as 因. |
| 4. | Funds, capital; cost price. |
| 5. | Food stock, ingredients. This usage may also be written in Kanji as 素 |
| 6. | A counter that counts the number of stumps of plants. |
Usage Notes:
1. 本・元 may also be in 元も子もない which means "losing everything".
2. As you may have noticed, usage number 4 is the same as the third usage of 下・許.
Examples
32. 失敗は成功の元だ。
Failure is the source of success.
33. 惨事の本を辿ろう。(Literary Spelling)
I will pursue the origin of this horrible accident.
34. 木の元を見つけたか。
Did you find the root of the tree?
35. 風邪は万病の元。
The cold is the source of all sorts of diseases.
36. 酒とタバコが因で健康を｛損・害｝う。
You lose health due to alcohol and tobacco.
37. 元のかかる商売は高い。
The transaction capital is high.
38. スープの素はあるの。
Do we have the soup stock?
39. 私は柳一本を植えた。
I planted a single willow tree.