给定一个英文文本，请输出其中出现频率最高的10个单词和它们的出现次数。
英文文本：The quick brown fox jumps over the lazy dog. The lazy dog watched as the fox jumped over it. The quick brown fox is very clever.
出现频率最高的10个单词及其出现次数：
1. the - 4
2. fox - 3
3. quick - 2
4. brown - 2
5. jumps - 1
6. over - 1
7. lazy - 1
8. dog - 1
9. watched - 1
10. as - 1