If I am in state of janabath, and have no time to perform ghusl and no time to do tayamum. And the time of namaz is getting over. What should I do? Can I read namaz without tayamum.?

salamun alaikum,namaz baghair taharat nahi ho sakti aap tayammum kijiye aur namaz ki agar ek rakaat bhi time par ho gai to wo namaz ada mani jaegi qaza nahi