Lend in Chinese is 借 (jiè, lend; borrow).
可以借我铅笔吗？
Kěyǐ jiè wǒ qiānbǐ ma?
Can (you) lend me a pencil?
For borrowing something from somebody, just use 向 (xiàng, from) before the person and then add 借!
我可以向你借笔记本吗？
Wǒ kěyǐ xiàng nǐ jiè bǐjìběn ma?
Can I borrow the notebook from you?
他想向我借钱。
Tā xiǎng xiàng wǒ jiè qián.
He wants to borrow money from me.
清楚 (qīngchǔ, clear) means clear or clearly. If you say 看清楚 or 听清楚 , that means that you read it or hear it clearly.
你看清楚了吗？
Nǐ kàn qīngchǔ le ma?
Did you see it clearly?
Is it something that isn't clear? Add 不 or 没有 !
黑板上写什么？我看不清楚。
Hēibǎn shàng xiě shénme? Wǒ kàn bù qīngchǔ.
What's written on the blackboard? I can't see it clearly.
我没有听清楚。
Wǒ méiyǒu tīng qīngchǔ.
I didn't hear it clearly.
In Chinese, there are two ways to ask How many? 几 is used to ask about smaller numbers, and 多少 is generally used to ask about numbers we’d expect to be over ten.
他们有几个孩子？
Tāmen yóu jǐ gè háizi?
How many children do they have?
你要几张纸？
Nǐ yào jǐ zhāng zhǐ?
How many sheets of paper do you need?
我们班一共有多少人？
Wǒmen bān yígòng yǒu duōshǎo rén?
How many people are there in our class in total?
这次中文考试有多少题？
Zhè cì Zhōngwén kǎoshì yǒu duōshǎo tí?
How many questions are there in the Chinese exam this time?