1. 他不仅足球踢得好，性格也不错。  

不仅……也/还/而且……

“不仅” is a conjunction that means “not only”. It’s often followed by “也/还/而且”, meaning “not only... but also...”. “不仅” is used after the subject when the two clauses share the same subject, and it is used before the first subject when the two clauses have different subjects.

For example:

Same subject:

- 我不仅会说汉语，还会说法语。（我会说汉语；我会说法语。）

I can speak not only Chinese but also French.

- 她不仅喜欢跳舞，也喜欢唱歌。（她喜欢跳舞；她喜欢唱歌。）

She likes not only dancing but also singing.

- 我爸爸不仅去过美国，而且去过很多次。（我爸爸去过美国；我爸爸去过很多次。）

My dad has been to the US not only once, but many times.

Different subjects:

- 不仅我没听懂，其他同学也没听懂。（我没听懂，其他同学没听懂。）

Not only did I not understand it, but the other students didn't either.

- 不仅妈妈不同意我和他结婚，我爸爸也不同意。（妈妈不同意； 爸爸不同意。）

Not only does my mother disagree with me on marrying him, but my father also does. 

- 不仅我会做中国菜，他也会做中国菜。（我会做中国菜； 他会做中国菜。）

Not only I but also he can cook Chinese food.

2.但我从来没这么快乐过。

“从来” is an adverb that means something has always been like this from the past to the present. It’s usually used in negative sentences. The phrase “从来不/没” means “never”. In positive sentences, you can use “一直” to indicate something has always been like this from the past to the present.

For example:

- 我从来没去过美国。

I have never been to The USA.

- 他从来没给我打过电话。

He has never called me on the phone.

- 我爸爸从来不抽烟。

My father never smokes.

- 我们老板开会从来不迟到。

Our boss never arrives late to meetings.

- 我一直开车去上班，从来没坐过公交车。

I always drive to work and have never taken the bus.

- 爷爷一直住在乡下，从来没去过城里。

Grandpa has always lived in the countryside, so he has never been to the city.

Notice that "从来" is seldom used in an affirmative sentence. When it is used, it can be replaced with "一直". For example:

-他从来都是一个人吃饭。= 他一直都是一个人吃饭。

He always eats alone.

3.刚 VS 刚才 

Both “刚” and “刚才” can indicate that an action that just happened a short time ago. So what's the difference?

1) "刚" and "刚才" are different parts of speech. “刚” is an adverb, which can only be used before the verb. Yet “刚才” is a noun of time that can be used either before or after the subject. In addition, they have different emphases in the sentences.

刚 adv. just; 刚才 n. just now

Subject + 刚 + verb (object) 

刚才+ subject + verb / subject +刚才+ verb

For example:

-你妈妈刚出去。

Your mom just went out.

-你儿子刚才来找过你。= 刚才你儿子来找过你。

Your son came to see you just now.

-我刚收到邮件，我被录取了。

I just got the email. I have been admitted.

我刚才收到邮件，我被录取了。= 刚才我收到邮件，我被录取了。

I received the email just now, and I was accepted.

2) "刚才" means that something happened just before you speak, indicating that the time interval is very short. “刚” can be used in a past event (a short time ago or a long time ago), or a future event. For example：

-我刚才去吃午饭了。

I went to lunch just now. (before you speak)

-我上个星期刚开始学汉语。

I just started learning Chinese last week. (long time ago)

-你刚开始学开车的时候，千万不要害怕，一定要相信你的教练。

When you first start learning to drive, don't be afraid, and trust your coach. (future event)

3) "刚才" can be followed by a negative word, while "刚" can not. For example:

-我刚才没出去。

I didn't go out just now.

-我刚才不想吃。

I didn’t want to eat just now.

4）"刚" can also mean achieving to a certain degree. For example:

-他刚及格。

He just passed.

-这双鞋不大不小，刚合适。

This pair of shoes is not too big or too small, it just fits.

5）"刚" is often used with "想/要" to indicate that something is about to happen but hasn't happened yet. For example:

我刚想给你打电话呢，你就回来了。

I was just about to call you when you came back.

我刚要出门，电话响了。

I was about to go out when the phone rang.