1. have no idea of 不知道 = be in ignorance of = be ignorant of
2. identify 认出，鉴定 identify one’s luggage
3. as if = as though 似乎 He looks as if he were tired if only 但愿 If only I were a bird.
4. even if = even though 即使 Even if it rains, I will go.
5. ignorant 无知的 an ignorant man 无知的人 be ignorant of不知道
