1. need作情态动词及实义动词的用法辨析：
(1)need作情态动词
①need作情态动词无人称和数的变化，后接动词原形，多用于否定句和疑问句。否定形式为needn’t.
e.g. You needn’t worry.
②由need引出的一般疑问句，肯定回答用must或have to；否定回答用needn’t.
e.g. Need I answer the question?
Yes, you must. /Yes, you have to.
No, you needn’t.
(2)need作实义动词
①意为“需要”，有人称和数的变化。
②结构：人+need to do sth.
物+ need doing
sth. = 物+ need to be done.
e.g. I need to answer the question.
She needs to help her parents do housework.
The room need cleaning.
= The room need to be cleaned.
2. have的用法辨析：
(1)have表示“有”，表示所属关系；
(2)have表示“吃”，常与三餐搭配，不用冠词；
(3)have表示“患或或得……病”；
(4)have 用于固定搭配。
e.g. I have an apple.
She usually has dinner at seven.
Tom has a fever and he should take his temperature.
Have a good time.
Have fun.
3. thanks to… 意为“幸亏，由于”；
thanks for…意为“感谢……”
e.g. Thanks to Tom’s help, I pass the exam.
Thanks for Mary’s coming, I didn’t feel lonely this day.
4. be interested in… 意为“对……感兴趣”；
take an interest in…意为“对……感兴趣”
e.g. My mother is interested in dancing.
Tom takes an interest in playing basketball.
5. be used to doing sth.与used to do sth.的辨析
(1)be/get used to doing
sth.意为“习惯于做某事”，to是介词，后跟名词，代词或动名词。而used to doing
sth.意为“过去常常做某事”，to为不定式符号，后跟动词原形;
(2)注意：（被动结构）The book isused to read.
e.g. Now she is used to getting up early.
He used to get up early.
6. alone与lonely的区别:
(1)alone意为“孤独的”，强调独自一人，为形容词，只作表语，不作定语；也可作副词，意为“孤独地”;
(2)lonely意为“孤独的，寂寞的”，强调内心的孤独寂寞，既可作表语，也可做定语。作定语时指地方荒无人烟。
e.g. He was alone in the house.
He came alone.
She lives alone, but she doesn’t feel lonely.
She felt lonely when she left alone.
It’s a lonely place.
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