A ) Study this example situation: Yesterday Karen and Jim played tennis. They began at 10:00 and finished at 11:00. So at 10:30 they were playing tennis. They were playing = they were in the middle of playing. They had not finished playing. Was/were/ - ing is the past continuous: I/he/she/it was playing /doing/working, etc. we/you/they were playing /doing/working, etc. B ) We use the past continuous to say that somebody was in the middle of doing something at a certain time. The action or situation had already started before this time but had not finished: This time last year I was living in Brazil...
Certainly! If you're looking for information about advanced English grammar, it would be helpful to know specific topics or concepts you're interested in. However, I can provide a brief overview of some advanced grammar topics related to writing "About Us" sections: Sentence Structure: Incorporate a variety of sentence structures to add complexity and interest to your writing. Use parallelism to create balance and cohesion in your sentences.