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I've just started Japanese, so please go easy on the grammar!

I see from this website that ~madeni means "by that time," but I'm not sure if
you just append that to the time you want to specify (i.e., rokujimadeni).
Also, is there a perfect and/or future perfect tense equivalent in Japanese?
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2016-03-08T13:44:26.987
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2016-03-08T14:31:46.887
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grammar tense aspect particle-まで
How to say "I will have arrived home by 6 pm."
Grammar wise it requires the attachment "hazu desu" (means should be... plus
other connotations), the present continuous verb(te form)+iru ... read [this
page by Maggiesensei](http://maggiesensei.com/2012/11/14/request-lesson-how-
and-when-to-use-%E3%81%AF%E3%81%9Ahazu/) for hazu desu.

[page for -teiru](http://maggiesensei.com/2014/07/31/how-to-
use-v%EF%BC%8B%E3%81%A6%E3%81%84%E3%82%8B-teiru-%E3%81%A6%E3%81%84%E3%81%BE%E3%81%99-teimasu/)

She is awesome in my opinion, and her pages are filled with examples as well
as incredible explanations!

My translation would probably be of the english sentence "I should be home
from 6pm (onwards <-- Implied)". Which has a similar feel.

> 私は午後6時から家に戻っているはずです。
>
> watashi ha gogo roku-ji kara ie ni modotteiru hazu desu.

gogo just means afternoon, so 18:00 not 06:00. The rest is particles and
vocab.

Keep in mind there is no one correct way to say something in language, so this
is what I would have strung up. However my grammar may have different
connotations so i'd appreciate being pulled up on anything wrong in my
understanding!
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2016-03-08T14:51:03.767
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2016-03-08T15:01:00.723
2020-06-17T08:18:27.500
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## ~madeni (~までに)

Yes, as you said, it's that simple - append "~までに" to the time you want to
specify.

**But!** Since this is used in future perfect, it's kinda weird to say までに. We
say **までには** (madeniwa.)  
**には** is a combination of `case particle` に and `engagement particle` は.  
**に** indicates the time the action ends (or starts,) and **は** indicates the
topic (or important point) in the sentence.

## Perfect / future perfect

There are 3 possible ways to interpret those tenses.

  * **Continuation**
  * **Experience**
  * **Completion**

And of course we have separate translations for those. We use:

  * **"~しつづけている"** for continuation 

> (Ex. He's been sick since yesterday - 彼{かれ}は 昨日{きのう}から 病気{びょうき}で寝{ね}
> **つづけている** )

  * **"~したことがある"** for experience 

> (Ex. I've been to Japan in the past - 私{わたし}は 前{まえ}に 日本{にほん}に 行{い}っ
> **たことがある**

  * **"~しまった"** or **"~したところだ"** for completion 

> I've arrived home - 私{わたし}は 家{いえ}に つい **たところだ**

And we use "~だろう" for future patterns, like:

> It'll rain soon. もうすぐ 雨{あめ}が 降{ふ}る **だろう**

However, it's not that simple to combine those, because the translation
changes (because it sounds weird)

  * For continuation, say "~ **したことになるだろう** " 

> I'll have lived in Japan for 5 years next August - 来年{らいねん}の 8月{がつ}で 私は 日本に
> 5年間{ねんかん} 住{す}んだ ことになるだろう

  * For experience, say "~ **したことになるだろう** " (same as continuation because I don't think there's _much_ difference in situation - in both usage the subject is still doing the thing.)
  * For completion, say "~ **しているだろう** " 
    * Let's take your sentence: 

> I'll have arrived home by 6pm - 私{わたし}は 6時{じ}まで **には** 家{いえ}に 帰{かえ}って
> **いるだろう**
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