He was too old to work any more.
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He was so old that he could not work any more.
I was too sleepy to keep my eyes open.
The coffee is too bitter for me to drink.
These shoes are too small for him to wear.
His wife is too lazy to get up earlier than he.
These bacterias are too small for us to see with the naked eye. But there are millions of them in the air, in the ground, and in water.
There are a great many stars in the sky, which are too far away from the earth for any instrument to detect.