When多is placed before a verb (action verb), it could mean ‘more’ referring to the object of the verb (the noun after the verb)
e.g. 我多买了一个。 - I bought one more or I bought one extra.
你们要多吃，才能长高呢。- Only if you need to eat more, you will grow taller.
他得多锻炼，他现在看起来不太好。- He needs to do more exercise, he does not look well now.
When 多 is placed before a stative verb (an adjective), it could mean ‘how’ referring to the extent that the stative verb/adjective embodies
e.g. 他的花儿多美呀！- How beautiful is his flower!
从你的家去我的家，多远！- How far is it from your house to mine?
多好的人呀！ - How good a person (he/she is)!
a. To give a lift to someone
e.g. 你爱人每天送你上班吗？- Does your wife/husband give you a lift to work everyday? or Does your wife/husband walk you to work everyday?
b. To deliver
e.g. 我在网上买东西，他们会送来吗？- If I buy stuff from the internet, will they deliver?
c. To give (as a present)
e.g. 他生日的时候，他的朋友送他一本他喜欢的书。- On his birthday, his friend gave him a book that he likes as a gift.
a. To arrive
b. (to the end pointing of time, place, number, etc, could be used as a co-verb or a resultative complement)
e.g. 从这儿到那儿很远。- It is far from here to there.
到9点我们回家。- Until 9, we will return home.
从这儿走到那儿，好不好？Walk from here to there, ok?
他们吃到饭店都关门了。They eat (so long) until the restaurant is closed.
他算到第五个。He calculated to the fifth.
c. (used as a resultative complement to indicate attainment)
e.g. 你看到那个名人了吗？- Have you seen the celebrity?
你买到那个难买的电影票了吗？- Have you got the movie ticket that is really difficulty to get?
4. 了 liăo
When is pronounced, it is used as a complement to verbs to indicate either completion 完or capabilities in a potential complement to stress that the action can or cannot be done.
e.g. 太多了，我吃不了。It's too much, I cannot eat them all.
我知道他来不了。I know he can’t come.
今天是到不了liăo了le。We can’t be there today (the 了le indicates a change from the original plan which was to arrive today)