弱い

よわい

weak

i-adjective

Conjugation Table

Present

弱い

Negative

弱くない

Past

弱かった

Past Negative

弱くなかった

Te Form

弱くて

Adverbial

弱く

Conditional

弱ければ

Presumptive

弱いでしょう

Example Sentences

彼は力が弱いです。

He is weak in strength.

Kare wa chikara ga yowai desu.

昨日、私は弱かったです。

I was weak yesterday.

Kinou, watashi wa yowakatta desu.

この薬は苦くて弱くない。

This medicine is bitter and not weak.

Kono kusuri wa nigakute yowakunai.

Grammar Notes & Usage Tips

•Basic Conjugation:** As an i-adjective, 弱い (よわい) follows standard conjugation patterns: for the negative form, simply replace the い with くない to get 弱くない (よわくない), meaning "not weak."

•Using in Sentences:** When describing a noun, place 弱い before it, like 弱い犬 (よわいいぬ) for "weak dog," and remember that no particle is needed between an i-adjective and the noun it modifies.

•Past Tense Tip:** To express past tense, change the い to かった, making it 弱かった (よわかった) for "was weak," a common pattern for i-adjectives in Japanese.

•Adverbial Form:** If you want to use 弱い in an adverbial sense, turn it into 弱く (よわく) by replacing the い with く, as in 弱く話す (よわくはなす), meaning "to speak weakly."

•い-adjective: Conjugates by changing the い ending