1. Every major city keeps changing and Lisbon is not an exception
Use ‘is no exception’. ‘be no exception’ is a fixed phrase
2. I had never really spoken to him except saying hello.
Use ‘except to say hello’. ‘except + to (V) is used to express ‘purpose’
3A. They want nothing except seeing that the children are happy.
Use ‘except to see’
3B. My brother is good at everything except to wash the dishes.
Use ‘except washing’
The form of verb after except + to is determined by the previous used main verbs like want, good at etc. (We mostly write, I want to do something. He is good at playing)
4. He was sorry that he had lied to her and asked her to excuse him.
Use ‘forgive’. ‘Excuse’ is used for minor faults and offences; ‘forgive’ is used for all faults and offences.
5. A manager is supposed to give a good example.
Use ‘set an example’/ ‘set a good example’
6. She was a very glad person, and very intelligent.
Use ‘a very happy person’. ‘glad’ is not used in front of a noun. We use ‘be + glad’ i.e I’ am so glad to see you.
7. He wears an old-fashioned glasses which make him look intelligent.
Use ‘glasses’ as a plural noun.
8. I have to vacuum the floors and clean the glasses of the windows.
Use ‘pane’ or ‘window-pane’ or use only ‘window/s
9. I got off my car to inspect the damage.
Got off a bus/train/plane/boat/ship/bicycle.
Get out of a car/taxi/boat/train/lift.
10. My father was a very gentle man, always helping people.
Use ‘a very kind man’. ‘Gentle’ means not loud/forceful/rough/harsh