Apologize: was/were going to – was/were supposed to

To apologise for not doing something. We usually give a reason.

Sorry, I was going to call you back last night, but I did not get home until late.

I had agreed to make a list of possible guests, but I didn’t know who to invite.

I was supposed to make a list of possible guests, but I didn’t know who to invite.

I had planned to call them, but I lost their phone number.

I had agreed to try and find his address on the Internet, but my computer wasn’t working.

I had planned to get my parents a present on Monday, but I couldn’t find my credit card.

I had decided to buy myself a new suit last week, but I didn’t have enough money.

I was going to buy myself a new suit last week, but I didn’t have enough money.

I had expected you to get in touch with Ani, but you lost her phone number.

I was supposed you to get in touch with Ani, but you lost her phone number.

I had expected my parents to go through their old address books, but they couldn’t find them.

I was supposed my parents to go through their old address books, but they couldn’t find them.

My sister’s angry because I was supposed to babysit for her last night, but I had to work late.

I was going to go to the gym after work, but I was too tired.

Oh, sorry. I was supposed to phone you last night, but I didn’t get home until midnight.

I feel awful. I was supposed to take my parents to the airport, but I completely forgot.

I was going to go to bed early, but some friends came round and stayed until 1 a.m.