She smiled in a friendly way. 她友好地微微一笑。

She speaks to people in a friendly way. 她友好地跟人们交谈。

They grinned at her in a friendly way. 他们友好地对她咧嘴笑了笑。

这句话不能说成：

She smiled friendlily. 她友好地微微一笑。

可以改为：

(1)She smiled amicably.

The couple parted amicably.  

这对夫妻客气地分手了.

We shall amicably offer our American friends the statue.  

我们将愉快地向美国朋友赠送这座雕像.

(2)She kindly smiled.

He kindly carried our picnic in a rucksack.

他很体贴地背着装有我们野餐食物的背包。

He had very kindly asked me to the cocktail party that evening. 

他很客气地邀请我参加那晚的鸡尾酒会。

Will you kindly obey the instructions I am about to give? 

劳驾你服从我要给出的指令好不好？

She speaks to people friendlily. 她友好地跟人们交谈。

They grinned at her friendlily. 他们友好地对她咧嘴笑了笑。

请问：那有其他的表达 in a friend way 的同义方式吗？

回答如下：in a friendly way=in a friendly manner=in a friendly fashion

回答如下：

赞同陈老师解答：

关于用...的方式有以下几种表达

(1)in+a+形容词+way

She smiled in a friendly way.  

她友好地笑了笑。

He had a strange way of talking. 

他说话的方式怪怪的。

(2)in+a+形容词+manner

She smiled again in a friendly manner. 

她又友好地微笑了一下。

I'm a professional and I have to conduct myself in a professional manner.  

我是专业人士，必须以专业的态度行事。

(3)in+a+形容词+fashion

There is another drug called DHE that works in a similar fashion. 

另外还有一种叫 DHE 的药物，药效也差不多。

It is happening in this fashion because of the obstinacy of one woman.  

事情会如此发展是因为一个女人的固执己见。

(4)in the pattern of 以....的 方式

A change in the pattern of his breathing became apparent.  

他的呼吸方式明显起了变化。

(5) in a +形容词+mode 以....模式/方式

 Levi is best known for work in a very different mode from what is to be found here. 

利瓦伊最为人所知之处在于他的工作风格同这里的人迥然不同。

when the camera is in manual mode.  

当相机处于手动拍摄模式的时候.