Some words used in this structure
adj. clear, easy, true, difficult, certain, etc.
n. fun, a pity, a shame, no use / good, etc.
p.p. said, believed, decided, hoped, etc.
Rewrite these sentences using an “it” structure.
1. Giving up smoking is difficult to do. It is d__if_fi_c_u_l_t _to__g_iv_e__u_p_s_m__o_k_i_n_g_. __
2. Some young people think they look attractive when they smoke. It seems _th_a_t__so_m__e_y_o_u_n__g_p_e_o_p_l_e_t_h_in__k _th_e_y__lo_o_k__a_t_tr_a_c_t_iv_e__w_h_e_n__th_e_y__s_m_o_k_e_._
4. It is a poor mouse that has only one hole.
1. It is never too old to learn. 2. It rains cats and dogs. 3. It never rains but it pours. 4. It is a poor mouse that has only one hole.
“It” can be used to talk about _w_e_a_t_h_e_r_, _t_im__e_, _d_i_s_ta_n__ce_, etc.