be (was /were)+主语+v-ing+ 其他
疑问词+be (was /were) +主语+v-ing
Exercises 一、用动词的正确时态填空 1.I_a_m__t_a_l_k_in_g___(talk).You_a_r_e__li_s_te_n_i_n_g(listen)to me now.
总结:过去进行时可表示_过__去__某__一__时__刻__或__某__一__时__ _间_正__在__进__行__的__动__作___.此时句子中往往有表示
__过__去____的时间状语。如
_la_s_t_n_i_g_h_t,_y_e_s_te_r_d_a_y_,_a_t_t_h_a_t_t_im__e_/_m__o_m_e_nt 等。
(1)when在英文中指:at or during the time that, 它既指时间点,也可指一段时间,while是 during the time that 只表示一段时间,因此在引导 时间状语从句时,when引导的时间状语从句中的 动词可以是瞬间性动词,也可以是延续性动词,而 while从句中的动词必须是延续性动词。 瞬间动词有哪些? (come,arrive,fall, go ,leave, open, close ….) eg:It was snowing when we arrived at the station.
2.Look,the boy _is__r_u_n_n_in__g_(run) 3. He__w_a_s__ just _le_a_v_i_n_g__(leave) when the telephone rang. 4.--__A_r_e_the students r_e_a_d_i_n_g_(read) English.--Yes, they are. 5.Tom_i_s_n_’_t _s_tu_d_y_i_n_g(not study) English. He is studying Chinese. 6. Jim’s family_w_e_r_e_h_a_v_i_n_g_ (have) supper when I came in. 7. One day, Edison w__a_s_w__a_it_in_g__(wait) for a train to arrive, and suddenly a little boy ran to the track(轨道) to play. 8. When the bell rang, jenny _w_a_s_w__a_it_i_n_g_ (wait) in her seat.