This verb follows the ichidan conjugation pattern.
Conjugation of 居合わせる
私/俺
Present informal tense
居合わせる
iawaseru
I do
Present informal negative tense
居合わせない
iawasenai
I don't do
Present formal tense
居合わせます
iawasemasu
I do
Present formal negative tense
居合わせません
iawasemasen
I do not do
私/俺
Past informal tense
居合わせた
iawaseta
I did
Past informal negative tense
居合わせなかった
iawasenakatta
I didn't do
Past formal tense
居合わせました
iawasemashita
I do
Past formal negative tense
居合わせませんでした
iawasemasen deshita
I did not do
私/俺
Imperative informal mood
居合わせよ
iawaseyo
do
Imperative negative mood
居合わせるな
iawaseru na
don't do
Imperative formal mood
居合わせてください
iawasete kudasai
please do
Imperative formal negative mood
居合わせないでください
iawasenai dekudasai
please do not do
私/俺
Te form - conjunctive stem
居合わせて
iawasete
do
Passive stem
居合わせられる
iawaserareru
did
Hypothetical tense
居合わせれ
iawasere
if I did
Hypothetical conditional stem
居合わせれば
iawasereba
did
私/俺
Volitional stem
居合わせよう
iawaseyō
will do
Potential stem
居合わせられる
iawaserareru
did
Continuative stem
居合わせ
iawase
doing
Causative stem
居合わせさせる
iawasesaseru
allow to do
私/俺
Imperfective stem
居合わせ
iawase
do
Examples of 居合わせる
Example in Japanese
Translation in English
マイクは運悪く 居合わせた
It's obvious that this Alex Dubrozny had feelings for her, and she was in love with Tony. Which probably didn't sit very well with him. So he kills her, kills Tony.