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keep sb from doing
4. lose (v.) -lost(过去式) – lost(过去分词)
lost (adj.) 迷路get lost=lose one’s way;
the lost/missing pen
loss (n.) the loss of a great beauty
5. serious (adj.) 严重的;严肃的
seriously (adv.)严重地;严肃地
be seriously ill/hurt=be badly ill/hurt
6. provide sth for sb 被动 sth be provided for sb
provide sb with sth. 被动sb be provided with sth.
单元重点、易错点回顾
7. receive 收到，接收
receive a letter/present/phone call from sb.
accept 接受(主观上愿意)
accept the invitation/advice/job
I received an invitation from Jim, but I didn’t accept it because I was far too busy .
(收到聚会邀请，但没有接受，表示不参加聚会)
8. fisherman--复数fishermen
但humans/Germans/Romans/Walkmans 随身听
9. a 100,000-dollar donation (one /w/辅音音标)
a 180,000-dollar donation (one /w/辅音音标)
an 18,000-dollar donation (18 /e?/元音音标)
an 11,000-dollar donation (11 /?/元音音标)
10.maybe (adv.) “也许、可能”，在句中作状语，相当
于perhaps,常位于句首。
may be may是情态动词,be是动词原形,相当于动词, 两者构成谓语,意为“也许是、可能是”。
[Maybe] he is a doctor. = He may be a doctor.
adv. 可能(状语) v.可能是(谓语)
11. 1)---Someone is knocking at the door.
---It must be Sandy. She said she