关于 very 和 very much 的区别，曾老师引用了《牛津英语用法指南》的有关论述，这一点我同意。但是，我对《牛津英语用法指南》“形容词和副词前面用very, 不用very much”的说法，提出质疑。我觉得，这个说法不够完整，或者过于简单片面。我的解答只针对《指南》，不针对曾老师，特此说明。

1. 在以a-开头的表语形容词之前，如afraid, alike, alone, ashamed等，用very或very much 都正确。如：

He is very (very much) afraid.

The twins are very (very much) alike.

2. 在-ed形容词作表语时，之前用very或very much都可以。一般说来，用very强调状态，用very much强调动作。如：

They are very tired.

They are very much tired (by the work).

He was very delighted.

He was very much delighted (with the results).

3. 在-ed形容词作定语时，之前用very或very much都可以。

They are very amused children.

They are very much amused children.

个人认为，第2条和第3条只是大致的规则，具体情况可能有所不同。对于初学者而言，掌握这些基本就可以了。