----- Nội dung dịch tự động từ ảnh ----- EX: They started working in that factory in 1998. →They have worked in that factory since 1998. a. Hoa started making models 2 months ago. →Hoa has made models b. I began to do yoga last week. c. His grandmother started to go for a walk when she was fifty years old. →His grandmother d. We began studying English a long time ago. →We Bỏ: -started/ began -Đổi động từ V-ING/ TO-INFINITIVE thành V3/ V-ed -thêm HAVE/ HAS vào -đối in/ when thành SINCE.. đổi ...ago thành FOR