i decide to leave him这里的动词短语在哪?

i decide to leave him这里的动词短语在哪? When we leave is for him to decide he was about to leave when someone called him 为什么这里的leave不需要 i decide to be leaving right now 和i decide to leave right no 短语动词的用法动词短语和动词用法一样吗?在一句话中,动词后接动词短语需要在动词短语前加to吗?比如 i want to it seem diffcult for him to decide（——）to leave or stay填空 I want to bike riding.是不是缺一个go?这里的bike riding是动词短语吗? 插入语用法I decide peter,(is)clever,to join the evening school这里的 请问1,所有有to do的短语都是动词不定式吗?如decide to do.2,动词不定式一定是 to do形式吗? I told him has to leave 与 I told him to leave.有何区别?第二句leave是 i speak to him,please.求四个可代替him的单词或短语 I decide to leave the company next month,where I for exactly