I don't know if he _ here.If he _ ,I'll tell you.

来源：学生作业帮编辑：搜搜考试网作业帮分类：英语作业时间：2024/04/29 23:10:11

I don't know if he _ here.If he _ ,I'll tell you.
A.comes,will come B.will come;will come
C.comes;comes D.will come;comes

D.第一个“if”是“是否”的意思,可加将来时.第二个“if”是“如果”的意思,不可用将来时.
在一般现在时的肯定句中,当主语为非第三人称单数时,谓语动词用原形；
当主语为第三人称单数时,谓语动词用单数第三人称形式.
实义动词的一般现在时的单数第三人称形式遵从“s,es,ies”六字母规则.
实意动词单数第三人称变化规律：
注意：不规则变化的有have—has,be—is,go—goes,do—does
一般现在时,当主语是第三人称单数时,谓语动词要用第三人称单数形式
主语是第三人称单数有以下几种情况：
（1）不可数名词做主语：
Some water is in the glass
（2）单个的可数名词做主语：
The girl is Chinese.My watch is on the dresser.
（3） He ,she ,it 等代词单个做主语:
He is in the tree.She likes her family very much.
（4）单个的人名,地名或称呼作主语：
Mary is a doctor.Uncle Li speaks a little English.
Changchun is a beautiful city.
（5）指示代词this,that 等作主语:
This is a pear.That is an apple .
（6） Everyone,everything ,something,nobody,nothing.等不定代词作主语时
Is everyone here today?Everything is ok .
（7）单个数字作主语时：
”8” is a good number in China.
动词单数第三人称形式的一般现在时的句子的否定句、疑问句及特殊疑问句.
否定句：
在主语的后面实义动词前加doesn’t(注意实义动词应恢复原形.)
主语（单三）+doesn’ + 动词原形+其他
Jim likes football变否定：Jim doesn’t like football
He has lunch at school.变否定：He doesn’t have lunch at school.
一般疑问句及答语,在句子前面加助动词does.实义动词恢复原形
Does +主语（单三）+ 动词原形+其他
Does your father work Yes,he does./No,he doesn’t
特殊疑问句：特殊疑问词+一般疑问句
特殊疑问词+ does +主语（单三）+ 动词原形+其他
Where does a bird live
How does she go to school?

I don't know if he ( ) If he ( ) .I'll let you know I don't know if my boyfriend_ the truth,If he _ the truth,I' don't know if he __.If he__,I will tell you I don't know if he ___(come) tomorrow.If he ____(come),I'll I don't know if he ___.if he ____,please tell me .(come) I don't know if he ( ) tomorrow I don’t know when he _________ tomorrow.If he _________,I’ll I donn't know when my father___.But if he ___I'll tell him a I don't know when he _(come)back.when he _(come)back,I will I don't know if he will come tomorrow i think he if he free 宾语从句语法I don't know if ／whether he still lives here after so i don't know _ _ _(多少次) HE HAS TRIED.