I want to speak to Tom.speak为什么用不定式而不用过去式啊?

can i speak to Tom? i was afraid to speak in class,是个过去式为什么不用spoke 动词不定式做补语动词不定式做宾语和做补语的区别?比如;I want you to speak to Tom 是做宾语吗? i was also afraid to speak in class afraid为什么不加to用不定式呢 I'd like to speak to Tom i want to speak to your head.” 怎样填May I speak to tom 怎样回答May I speak to tom — Hello. May I speak to Tom? i was also afraid to speak in class afraid为什么用过去式 I want to speak English better ,so. I have heard him speak about you often.为什么用speak而不用speaks?