all you have to do是句子的主語部分,all是中心詞,you have to do前面其實(shí)省去了that,（that）you have to do是一個(gè)定語從句,修飾前面的不定代詞all,all是先行詞.is和to listen 構(gòu)成系表結(jié)構(gòu)是對的.all you have to do 后面不能加that,因?yàn)閷?shí)際上是定語從句that you have to do中that在定語從句中作賓語,故可以省去,但do后不能有that,因?yàn)閷?shí)際上do在前面已經(jīng)有了關(guān)系代詞that作它的賓語（它是有賓語的）.have to do的結(jié)構(gòu)為have to+ 動詞原形,have to do在（that）you have to do這個(gè)定語從句中作謂語.補(bǔ)充：you have to do是all的定語從句,不是插入語.