JAPANESE VERB

いる

to need

Conjugation

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Form	Polite	Plain
AffirmativeI need
NegativeI don’t need

finished actions

Form	Polite	Plain
AffirmativeI needed
NegativeI didn’t need

て形 · joining actions, “doing”, requests

可能形 · “can”

Form	Polite	Plain
AffirmativeI can need
NegativeI can’t need

たい形 · “want to”

Form	Polite	Plain
AffirmativeI want to need
NegativeI don’t want to need

意向形 · “let’s”, “I’ll”

Form	Polite	Plain
Let’slet’s need

条件形 · “if” and “when”

命令形 · from gentle to blunt

受身形・使役形 · “is done”, “make someone do”

Form	Polite	Plain
PassiveI am needed
CausativeI make someone need

One sentence for each tense, the way people say it.

Present and future

このレストランはよやくが いります か。

Does this restaurant need a reservation?
Past

カナダのひとはビザが いりませんでした。

Canadians didn't need a visa.
Te-form

ひっこしにおかねが いって、たいへんです。

Moving takes money, and it's hard.
Potential

ひとりでできます。てつだいは いりません。

I can do it alone. I don't need help.
Want to

おみやげは いりません。きもちだけでじゅうぶんです。

I don't need a souvenir. The thought alone is plenty.
Volitional

いるものをいっしょにかいましょう。

Let's buy what we need together.
Conditional

なにか いれば、 いって くださいね。

If you need anything, just say so.
Commands and requests

いるものだけもってきなさい。

Bring only what you need.
Passive and causative

いらない ものまでかわされました。

I was made to buy even things I didn't need.

いる (to need) is godan: いります, いりません. いる (to be there) is ichidan: います, いません.
What you need takes が: パスポートがいります.
いる (to need) is used in the present, past, て and ば forms; nobody says いれる, いりたい or いろう, so those sentences show いる beside another verb.