初中英语不定式讲解课件(共30张PPT)

(共30张PPT)
Unit 1 Helping those in need
第3课时 ——语法
1) 动词不定式作主语，谓语动词用第三人称单数。
直接把动词不定式放在句首的情况比较少见，通常主语用it来作形式主语，把真正的主语，即动词不定式放在后面。
形成句型结构： It is+形容词(easy, important, difficult, foolish, inconvenient, unnecessary, right, wrong...)+( for/of sb.)+不定式（）
To master a foreign language is necessary.
It is difficult to make money in some big cities.
It is important for us young people to learn English and master it.
2) 动词不定式作表语。常用于说明主语的内容、性质、特征。
My plan is to visit the Great Wall next week.
Our duty is to protect the environment
常用的动词+to do作宾语有：
想要，忘记，拒绝（want, forget, refuse）
需要，努力，学习（need, try, learn ）
喜欢，同意，帮助（like, agree, help）
希望，决定，开始（hope, wish, decide, begin, start）
类似用法动词汇总
advise sb (not)to do sth建议某人（不）做某事
want sb (not)to do sth想要某人（不）做某事
teach sb (not)to do sth教某人（不）做某事
warn sb (not)to do sth提醒某人（不）做某事
allow sb (not)to do sth允许某人（不）做某事
ask sb (not)to do sth叫某人（不）做某事
order sb (not)to do sth命令某人（不）做某事
expect sb (not)to do sth期待某人（不）做某事
tell sb (not)to do sth告诉某人（不）做某事
encourage sb (not)to do sth鼓励某人（不）做某事
感官动词、使役动词后接不带to的不定式
例如: 1. The teacher lets him ____（read）loudly.
2. The joke makes me_______ （laugh）.
3. I often see him _____（ carry ）water.
4. Do you hear birds _____（ sing）
every morning
注意：
carry
sing
read
laugh
notice
listen to
hear
watch
五看
see
look at
observe
三使
let
make
have
二听
一感觉:
feel
+sb. do sth.
（不带to）
动词不定式 作定语。修饰名词或代词，常置于所修饰词之后。
Do you have anything to say
I have a lot of work to do.
A
C
A
C
C
C
B
B
A
B
to wash
to do
to bring
to launch
to have
laugh
to catch
to have
to give
not to drive
谢谢您的观看与聆听