Use the gerund instead of the subordinate clauses. 1. he didn`t even acknowledge that had received the invitation. 2. i remember mother reprimanded me when i spoiled her favourite fish-cake. 3. we recommended that the work should start at once. 4. thank you that you reminded me. 5. nick suggested that we should dine at a restraint to celebrate this little event.

1. He didn`t even acknowledge having received the invitation.
2. I remember mother's reprimanding me for my spoiling her favourite fish-cake.
3. We recommended starting the work at once.
4. Thank you for reminding.
5. Nick suggested our dining at a restraint to celebrate this little event.