Ⅲ Write down the past tense of each verb. Try to find the rule of each group.
1. build send spend lend
Rule:
2. cut hit let put cost
Rule:
3. throw blow grow know
Rule:
4. drink begin swim ring sing
Rule:
5. dig get sit win hold
Rule:

built
sent
spent
lent
过去式将末尾的d改为t
cut
hit
let
put
cost
过去式和原形一致
threw
blew
grew
knew
过去式将o改为e
drank
began
swam
rang
sang
过去式将i改为a
dug
got
sat
won
held
过去式将一个元音字母改为另一个元音字母

Ⅳ Make sentences in the simple past tense with the words in brackets.
1.

(subway; yesterday)
The girls took a subway yesterday.
2.

(picnic; last month)
3.

(film; just now)
4.

(camping; in 2021)
5.

(book; two hours ago)
6.

(newspaper; months ago)

The family went on a picnic last month.
They watched a film just now.
The kids went camping in 2021.
The girl read books two hours ago.
The boys sold newspaper months ago.