不定式和现在分词作表语的区别

【不定式作表语】
1.说明主语的具体内容.
如：Mary'task is to set the table.
2.表其他如目的.
如：This wall is to keep people out of the garden.
【现在分词作表语】
1.某些现在分词已变作形容词可作表语.（如表情绪的词.）
如：He was very amusing.
2.表状态、品质的现在分词可用作表语.
如：She is always very obliging.
祝开心!