tolong bantu buat masing masing lima kalimat future obligation,past obligation dan present obligation

Present/ Future Form

Singular

I’m supposed to….She’s supposed to….He’s supposed to….It’s supposed to….future obligation
-excuse me sir,would you help me?
-hey bro could you take my diary book?
-i would be an endenger doctor
past
-i have been do this for an hour ago
present 
-i could see this
rumusnya 
Past Form

Singular

I was supposed to….She was supposed to….He was supposed to….It was supposed to….

Plural

We were supposed to….You were supposed to….They were supposed to….