1. —Have you decided on a book for your report, Peter? 彼得，你为报告选定书了吗？
—Oh, yes. I've picked *The Final Problem*. 是的，我已经选了《最后一案》。
【感知】(1) Have you chosen a book yet? 你选好一本书了吗？
(2) I have read *Journey to the West* and I've just chosen it for my book report. 我已经读过《西游记》了，而且我刚刚选它来写我的读书报告。
(3) She has already borrowed it from the library. 她已经从图书馆把它借走了。
(4) They haven't finished the work yet. 他们尚未完成工作。
(5) —Have you ever heard of this book? 你曾经听说过这本书吗？
—No, I have never heard of it. 不，我从未听说过。
(6) I have just finished *The Romance of the Three Kingdoms*. 我刚刚读完《三国演义》。
【思考】(1) 以上句子是时。
(2) 现在完成时的肯定句式为“”，否定句式为“”。
(3) already 意为，常用于现在完成时的句中，可用于句中或句尾。yet 意为，常用于现在完成时的句或句中。ever 意为，常用在时态的疑问句中。never 用在现在完成时中意为，表示强烈否定。just 在现在完成时中意为。
(4) 用法：过去发生或已经完成的动作对现在造成的影响或结果。
—Have you decided on a book for your report? 你选定书写报告了吗？
—Yes, I have. / No, I haven't. 是的，我已经选了。/ 没有，我还没选呢。
【运用】用 already、yet、never、ever、just 填空。
(1) I have seen him before so I have no idea about him.
(2) Amy has finished her homework. It's hard to believe.
(3) They haven't chosen them .
(4) —Have you seen the film?
—Yes, I have seen it.
(5) I have bought the new dictionary. You can borrow it if you need to.

思考：(1) 现在完成 (2) 主语 + have/has + done；主语 + haven't/hasn't done (3) 已经；肯定；尚未；否定；疑问；曾经；现在完成；从未；刚刚
运用：(1) never (2) already (3) yet (4) ever；already (5) just