incapable

Il est incapable de mentir.

He is incapable of telling a lie.

Il est incapable de chanter.

He can't sing.

Il était incapable de bouger.

He was unable to move.

Je suis incapable de siffler.

I cannot whistle.

Je suis incapable de faire ça.

I'm unable to do that.

J'ai été incapable de sauver Tom.

I was unable to save Tom.

J'étais incapable d'aller dehors.

I was unable to go outside.

Tu peux nager mais j'en suis incapable.

You can swim, but I can't.

Tom était incapable de quitter Marie du regard.

Tom couldn't keep his eyes off of Mary.

Je suis incapable de marcher aussi vite que lui.

I can't walk as fast as he does.

Il semble être incapable de nager.

It seems that he is unable to swim.

Je fus incapable de me tenir debout plus longtemps.

I was unable to stand any longer.