《新概念英语自学导读第一册》是《新概念英语》系列的一套辅助教材。文章对《新概念英语》中的语法，词汇和长句难句都做了详细的剖析和阐述，从而更好的帮助同学们学习和吸收。下面就一起来学习下吧！
课文详注 Further notes on the text
1．is surrounded by 由……环绕着
2．hundreds of people 数以百计的（游）人
3．Visitors have been asked to keep the woods clean and tidy. 游客已被告知要保持树林的整洁。
句中 have been asked是被动语态的完成时结构。（详见本课语法部分。）to keep the woods clean and tidy是动词不定式短语，作主语visitors的补足语。clean and tidy 是宾语 the woods 的宾语补足语。
4．go for a walk 去散步
5．What I saw made me very sad. 我所见到的一切使我非常难过。
句中的主语What I saw 是 what 引导的名词性从句。
语法 Grammar in use
被动语态（2）
上一次介绍了被动语态的一般现在时和一般过去时形式，这里介绍其现在完成时和一般将来时形式：
（1）现在完成时形式： has/have + been + 过去分词：
（2）一般将来时形式： will/shall +be +过去分词：
词汇学习 Word study
1．place v.
（1）（小心地）放；放置：
（2）任命；安置：
2．prosecute v.
（1）起诉，检举；依法处置：
2）〈书面语〉彻底进行；执行：
3．surround v.
包围；围绕：
练习答案 Key to written exercises
Lesson 144
A
1 The writer lives in a very old town which is surrounded by beautiful woods.
2 Because it is a famous beauty spot.
3 Visitors have been asked to keep the woods clean and tidy.
4 Litter baskets have been placed under the trees.
5 The writer went for a walk in the woods.
6 Yes, he saw a lot of rubbish.
7 He saw a sign among the rubbish.
8 The sign said, "Anyone who leaves litter in these woods will be prosecuted".
B
1 Someone has aired it. It has already been aired.
2 Someone has cleaned them. They have already been cleaned.
3 Someone has emptied it. It has already been emptied.
4 Someone has sharpened it. It has already been sharpened.
5 Someone has turned them on. They have already been turned on.
6 Someone has bought them. They have already been bought.
7 Someone has swept it. It has already been swept.
8 Someone has taken them to school. They have already been taken to school.
9 Someone has invited them. They have already been invited.
10 Someone has told them. They have already been told.
C
1 It hasn't been aired yeet. It will be aired tomorrow.
2 They haven't been cleaned yet. They will be cleaned tomorrow.
3 It hasn't been emptied yet. It will be emptied tomorrow.
4 It hasn't been sharpened yet. It will be sharpened tomorrow.
5 They haven't been turned on yet. They will be turned on tomorrow.
6 They haven't been watered yet. They will be watered tomorrow.
7 It hasn't been repaired yet. It will be repaired tomorrow.
8 It hasn't been dusted yet. It will be dusted tomorrow.
9 They haven't been corrected yet. They will be corrected tomorrow.
10 It hasn't been shut yet. It will be shut tomorrow.
