I'm too tired to walk any further.

Source: Tatoeba

The horse stopped and wouldn't move.

Source: Tatoeba

She tried to lift the box, but found it impossible.

Source: Tatoeba

You can't lift the piano.

Source: Tatoeba

The knife was so blunt that I could not cut the meat with it and I resorted to my pocket knife.

Source: Tatoeba

I'm so tired that I can't walk any longer.

I'm too tired to walk any longer.

I'm too tired to walk any more.

Source: Tatoeba

He froze with fear when he saw the snake.

Source: Tatoeba

Now I am too old to walk.

Source: Tatoeba

I am too tired to walk any more.

Source: Tatoeba

It won't budge one bit.

Source: Tatoeba