He appears to have caught a cold. 总结:动词不定式短语作 __表__语______ 时, 表示具体动作或将来动作。
Different functions of To-infinitive
3)常与不定式做宾语连用的动词有:want, hope, wish, offer, fail, plan, learn, pretend, refuse, manage, help, agree, promise, prefer, 如果不定式(宾语)后面有宾语补足语, 常用it作形式宾语,真正的宾语(不定式)后置,放在 宾语补足语后面,如:
Different forms of To-infinitive
2)进行式:不定式的进行式所表示的动作 与谓语动词动作同时发生,例如:
The boy pretended _t_o_b_e__st_u_d_y_i_n_g_h__a_rd____ (在努力学习).
He seems _to__b_e_r_e_a_d_i_n_g_________ (正在看 书) in the room.
force, call on, wait for, invite. 有些动词如make, let, see, watch, hear, feel, have等 与不带有to的不定式连用,但改为被动语态时, 不定式要加to, 如: I saw him cross the road.
→ He was seen _t_o__c_r_o_s_s_t_h_e__r_o_a_d____ .
Different functions of To-infinitive
1)To finish the work in ten minutes is very hard.