因为单数，复数都行。
When asked why he was late for school， he told a lie.
He scorns telling lies .他嘲笑说谎行为。
You should n't tell lies .不兴说谎。
You must n't tell lies .不许说谎。
He never actually tells lies ， but he often sails pretty close to the wind .他实际上从不撒谎，但说的话常迹近撒谎。
If you continue to tell lies ， you will forfeit the good opinion of everyone .你如果继续撒谎，就会失掉大家对你的好感。
It is important， if one does not wish to inconvenience and to bore one's friends， not to tell lies .
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