后面的介词用for，例如：
1.We are not going to beg for help any more.我们不会再乞求帮助。
2.We need help but we will not beg for it.我们需要帮助，但不会乞求帮助。
3.He wants to see them beg for mercy.他想亲眼看着他们求饶。
4.He will never beg for his life.他绝不会乞求饶命的。
后面的介词用for，例如：
1.We are not going to beg for help any more.我们不会再乞求帮助。
2.We need help but we will not beg for it.我们需要帮助，但不会乞求帮助。
3.He wants to see them beg for mercy.他想亲眼看着他们求饶。
4.He will never beg for his life.他绝不会乞求饶命的。
