Them S / es vao dau dong tu come, work, leave, like, belong, begin, start, make, run, hope
Them s/es vao sau dong tu say , give, cry, grow, fix, build, smile, work, pull, draw, swing, show, sew , push, brush, dig
says
gives
cries
grows
fixes
builds
smiles
works
pulls
draws
swings
shows
sews
pushes
brushes
digs
gives
cries
grows
fixes
builds
smiles
works
pulls
draws swings shows sews pushes brushes digs
says
gives
cries
gorws
fixes
builds
smiles
works
pulls
draws
swings
shows
sews
pushes
brushes
digs
Them S / es vao dong tu sau study, feel, bake, drive
Studies
Feels
Bakes
Drives
Them S / es vao dong tu sau finish, end, take, return, swim, write
finishes
ends
takes
returns
swims
writes
Them s/ es vao sau dong tu dance, speak, bring, sit, put, hit, lay, repeat, know, collect, love, hate
1 dances
2 speaks
3 brings
4 sits
5 puts
6 hits
7 laies
8 repeats
9 knows
10 collects
11 loves
12 hates
dances, speaks,brings,sits,puts, hits,lays, repeats,knows,collects,loves,hates
Them s/ es vao moi cau sau dong tu keep, stand, set, visit, pay, dress, read, jump, sing, throw, think
1 keeps
2 stands
3 sets
4 visits
5 pays
6 dresses
7 read
8 jumps
9 sings
10 throws
11 thinks
keeps
stands
sets
visits
pays
dresses
reads
jumps
sings
throws
thinks
Them s/es vao dong tu sau tell, ride, fill, send, help, laugh, teach, sleep, paint, pick, turn, shout, pour, burn
1 tells
2 rides
3 fills
4 sends
5 helps
6 laughes
7 teaches
8 sleeps
9 paints
10 picks
11 turns
12 shouts
13 pours
14 burns
thêm es vào sau động từ
buy study come leave belong play
buys
studies
comes
leaves
belongs
plays
V | V-e/es | V | Ve/es |
Have |
| Know |
|
Do |
| Take |
|
Say |
| Think |
|
Get |
| Come |
|
Make |
| Give |
|
Go |
| Look |
|
See |
| Use |
|
Find |
| Need |
|
Want |
| Seem |
|
Tell |
| Ask |
|
Put |
| Show |
|
Mean |
| Try |
|
Beacome |
| Call |
|
Leave |
| Keep |
|
Work |
| Feel |
|
1.have=>has
2.do=>does
3.say=>says
4.get=>gets
5.make=>makes
6.go=>goes
7.see=>sees
8.find=>finds
9.want=>wants
10.tell=>tells
11.put=>puts
12.mean=>means
13.become=>becomes
14.leave=>leaves
15.work=>works
16.know=>knows
17.take=>takes
18.think=>thinks
19.come=>comes
20.give=>gives
21.look=>looks
22.use=>uses
23.need=>needs
24.seem=>seems
25.ask=>asks
26.show=>shows
27.try=>tries
28.call=>calls
29.keep=>keeps
30.feel=>feels
dat mot hieu dien the U =30 V vao hai dau doan mach thi thu duoc I khi tang U them 15 V thi cuong do dong tang them 0,4 A tinh cuong do dong ban dau
Tóm tắt :
\(U=30V\)
\(U'=15V+U\)
\(I'=0,4A+I\)
\(I=?\)
GIẢI :
Hiệu điện thế U' tăng thêm 15V là :
\(U'=15V+U=15+30=45V\)
Ta có : \(\dfrac{U}{I}=\dfrac{U'}{I'}\)
\(\Leftrightarrow I'=\dfrac{U'.I}{U}\)
\(\Leftrightarrow I+0,4=\dfrac{45+I}{30}\)
\(\Leftrightarrow30\left(I+0,4\right)=45+I\)
\(\Leftrightarrow30I+12=45+I\)
\(\Leftrightarrow30I-I=45-12\)
\(\Leftrightarrow I=\dfrac{33}{29}\left(A\right)\)
Vậy cường độ dòng điện ban đầu là 33/29(A)
Gọi điện trở của đoạn mạch là R ta có :
+R =U/I (1)
+R=U+15/I+0,4 (2)
từ (1) và (2) suy ra:
U/I =U+15/I+0,4
=>U.I +15I=U.I +0,4 U
=>15I=0,4U=0,4 .30=12
=>I=12/15=0,8 A
Vậy .....
Chúc bạn học tốt ^.^ !