If you need anything, feel free to ask. 如果需要什么，尽管向我要。

　　I need more time to think it over. 我需要多点时间来考虑考虑。

　　Do you need an answer right now? 你现在立马需要答复吗？

　　I need a new bed to sleep on.  我得找个新床睡觉。

　　They sell them at the department store.  百货商场应该有卖的。