${11.}$ He said he was going to Brighton the following day.

→ S + said (that) + S + V(lùi thì)

${12.}$ Mary asked Margaret if she was hungry.

→ S + asked + O + if/wheter + S + V(lùi thì): câu gián tiếp dạng câu hỏi yes/no

${13.}$ He asked Thao if she went to school every day.

→ câu gián tiếp dạng câu hỏi yes/no

${14.}$ The teacher asked me if I could clean the board.

→ câu gián tiếp dạng câu hỏi yes/no

${15.}$ My mother told me to write these lessons carefully.

→ S + asked/told/warned/invited/reminded .... + O + (not) to_V: câu gián tiếp dạng mệnh lệnh

${16.}$ Susan says they would have to go then.

${17.}$ I asked his mother when he went to work by bus every day.

→ S + asked + O + wh/h + S + V(lùi thì): câu gián tiếp dạng câu hỏi wh/h

${18.}$ Minh asked Hong if her brother could swim.

→ câu gián tiếp dạng câu hỏi yes/no

${19.}$ He told me to turn off the lights when going out of the room.

→ câu gián tiếp dạng mệnh lệnh

${20.}$ My mother asked what time I had finished my homework.

→ S + asked + O + wh/h + S + V(lùi thì): câu gián tiếp dạng câu hỏi wh/h