Chia thành 2 thì quá khứ tiếp diễn hoặc quá khứ
chia thành 2 thì:quá khứ tiếp diễn hoặc quá khứ
While I ________ (watch) TV, the phone ________ (ring). Yesterday, she ________ (cook) dinner when her friend ________ (arrive). We ________ (play) football when it suddenly ________ (start) raining. They ________ (have) a picnic in the park when a squirrel ________ (steal) their sandwiches. He ________ (study) at the library when he ________ (realize) he forgot his notebook at home. When the teacher ________ (enter) the classroom, the students ________ (work) quietly. We ________ (walk) in the forest when we ________ (hear) a strange noise. Last night, while I ________ (read) a book, my cat ________ (jump) on my lap. They ________ (dance) at the party when the music suddenly ________ (stop). The kids ________ (play) in the garden when it ________ (start) to snow.