JAPANESE VERB

はんたいする

反対する

to oppose

Conjugation

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Form	Polite	Plain
AffirmativeI oppose
NegativeI don’t oppose

finished actions

Form	Polite	Plain
AffirmativeI opposed
NegativeI didn’t oppose

て形 · joining actions, “doing”, requests

可能形 · “can”

Form	Polite	Plain
AffirmativeI can oppose
NegativeI can’t oppose

たい形 · “want to”

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

意向形 · “let’s”, “I’ll”

Form	Polite	Plain
Let’slet’s oppose

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 opposed
CausativeI make someone oppose

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

Present and future

ちちはわたしのいけんにいつも はんたい する。

My father always objects to my opinions.
Past

じゅうみんはあたらしいどうろに はんたい した。

The residents opposed the new road.
Te-form

はははいぬをかうことに はんたい している。

My mother is against getting a dog.
Potential

しゃちょうのまえでは、だれも はんたい できない。

In front of the president, nobody can object.
Want to

ほんとうは はんたい したかった。

Honestly, I wanted to object.
Volitional

このけいかくにはみんなで はんたい しよう。

Let's all oppose this plan together.
Conditional

りょうしんが はんたい したら、どうする？

What will you do if your parents are against it?
Commands and requests

りゆうもないのに、 はんたい しないで ください。

Please don't object without a reason.
Passive and causative

けっこんは、かのじょのちちに はんたい された。

Our marriage was opposed by her father.

はんたいする takes に: りゅうがくにはんたいする; はんたい alone also means "the opposite" or "the other way round".

The same pattern, on other verbs: する verb.