Are these sentences correct? 1. I think Chinese is interesting but I feel that Chinese grammar is a bit hard. 我思的中文有意思 但是我觉的中文语法一点儿难。 2. Last year on April 12th at 5:30pm she reviewed Chinese very fast. 她去年四点十二号五点半中文复习得很快。 3. How about you teach me to write characters? 你教我字，怎么样？ 4. You write Chinese way too slowly/You speak Chinese way too slowly. 你中文写得太慢。 你中文说得太慢。 5. How did you come here? 你来这儿怎么？

How do you say this correctly?

(As an example)

我喜欢学习得中文。

or is it

我喜欢学习中文。

Is the particle 得 supposed to come before an adverb like 快 or is it always supposed to come after a verb regardless of whether or not there is an adverb following it?

Which sentence is correct?

我昨天学习中文学习得。

我昨天学习得中文。

我昨天学习中文。

What if I wanted to add a bit using 'but':

我昨天学习得中文可是我不记得。

Furthermore, I would like to specify an exact time and say the first exam is harder than the second in the following sentence：

我星期四八点半有两个考试, "but the first exam is harder"?