帮我答一下这几道英语题 。。 急！！！

1.He has a new book.
2.He lives in the country.
3.He shall see you tomorrow.
4.He can understand you.
5.He must write a letter.
6.He may come next week.
7.He does a lot of work every day.
8.He did a lot of work every day.
一般情况下，第三人称单数做主语，谓语动词（即句中的动词）要用单数，一般加-s,特殊情况下加-es。
在有情态动词的情况下，如有Must,can, shall, will, would,may等时，不需改变动词的形式。

he has a new book
he lives in the country
he will see you tomorrow
he canunderstands you
he must write a letter
he may come next week
he does a lot of work every day
he did a lot of work yesterday

主要是把动词变成第三人称单数,也就是加S

He has a new book.
He lives in the country.
He shall see you tomorrow.
He can understand you.
He must write a letter.
He may come next week.
He does a lot of work every day.
H did a lot of work yesterday.

如果是过去式动词不用改,如果是一般现在时动词改成单数,但有情态动词时不用改,如果是将来时也不用改

he has a new book
he lives in the country
he will see you tomorrow
he ynderstands you
he must write a letter
he may come next week
he does a lot of work every day
he did a lot of work yesterdy
要根据主语来确定谓语的单复数。