Unit 6 How long have you been collecting shells?教案
(1) from是介詞，后接名詞、動名詞，表示事情的開始點，以from短語作狀語時，句中的謂語動詞可用一般現(xiàn)在、過去和將來時, 如：
the movie is on from 8:00 p.m. to 10:00 p.m. 這個電影在晚上8點到10點上映。
they chatted at the meeting from beginning to end.他們在會議上自始至終都在聊天。
(2) since則為介詞或從屬連接詞，其后接名詞、動名詞或從句，表示從某一特定時間起直至現(xiàn)在或過去某一特定時間為止，依然繼續(xù)著的事情的開始點，在以此為時間狀語的句子中，謂語動詞常用完成時。
如：
many things have happened since they came here.
自他們來這兒以后，發(fā)生了許多事情。
the teacher said that john had made great progress since last semester.
老師說從上個學(xué)期以來約翰取得了很大的進步。
(3) for 是介詞，后接名詞，可以用來計算持續(xù)的時間，表示事情從開始到結(jié)束所持續(xù)的時間，謂語動詞常用過去時或完成時，for與一般現(xiàn)在時連用，表示時間一直持續(xù)到將來。
如：
the meeting lasted for hours. 會議持續(xù)了幾個小時。
i studied the piano for three years. 我學(xué)過三年鋼琴。
i've known her for five years. 我認識她已經(jīng)五年了。
how long are you here for? 你在這里要待到什么時候?
ⅴ.【習(xí)題檢測】
一. 單項選擇
1. the flight from beijing to new york ______ at 9:45 am. on friday.
a. gets off
b. takes off
c. puts up
d. gets up
2. — ______ have you been living here？
— for ten years.
a. how much
b. how many
c. how long
d. how soon
3. — _______ did you first skate?
— two years ago.
a. when
b. what
c. why
d. how
4. i have been skating _____ two hours.
a. in
b. at
c. for
d.since
5. thanks for ____ me the book.
a. gave
b. giving
c. give
d. to give
6. we all helped him with his english so he didn’t _______ with his study.
a. fall off
b. fall down
c. fall behind
d. fall over
7. mr green _______ in china since five years ago.
a. lived
b. has lived
c. lives
d. is going to live
8. ＿＿＿ is the meeting going to last? about twenty minutes.
a. how far
b. how soon
c. how long
d. how often
9. what shall we do now? ＿＿＿ for a walk?
a. how's about to go
b. what about to go
c. how's about going
d. what about going
10. do you have another way of ＿＿＿ the child?
a. teaching
b. to teach
c. teaches
d. teach
二. 根據(jù)所給句子的意思和首字母寫單詞
1. d_________say what sb./sth. is like
2. r _________bring or collect sth. together