四十歲的用法和樣例：
例句
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這不好猜，但我猜她大約是四十歲左右。
It's a long shot, but I should say she's about forty. -
想不到四十歲的人竟像個孩子。
You wouldn't think a man of forty could be such a child. -
他剛剛四十歲時，頭發就變得灰白了。
His hair became gray when he was only forty. -
也許我錯了，但是我想她快四十歲了。
Perhaps I am wrong, but I think she is near forty.
