要使用BeautifulSoup将不同段落中的单词连接在一起，可以按照以下步骤进行：

1. 导入必要的库：from bs4 import BeautifulSoup

2. 创建一个BeautifulSoup对象：soup = BeautifulSoup(html, 'html.parser')，其中html是包含段落的HTML字符串。

3. 使用find_all方法找到所有的段落标签：paragraphs = soup.find_all('p')

4. 创建一个空字符串变量，用于存储连接后的单词：result = ''

5. 遍历每个段落标签，提取文本内容并连接到result变量中：for p in paragraphs: result += p.text + ' '

6. 最后，result变量中就包含了所有段落中的单词连接在一起的文本。

以下是完整的示例代码：

from bs4 import BeautifulSoup

html = '''


This is the first paragraph.
This is the second paragraph.
This is the third paragraph.


'''

soup = BeautifulSoup(html, 'html.parser')
paragraphs = soup.find_all('p')

result = ''
for p in paragraphs:
    result += p.text + ' '

print(result)

运行上述代码，输出结果为：This is the first paragraph. This is the second paragraph. This is the third paragraph.