30:17
STRUCTURE
2415 Views
01:56
READING COMPREHENSION &VOCABULARY
1345 Views
01:52
The Form of Irregular Verbs
1358 Views
01:59
The Tense of the Passive Voice
1432 Views
09:31
Changing from Active into Passive
1210 Views
07:20
The Form of the Passive Voice
1416 Views
03:29
What is the Passive Voice?
1456 Views
03:45
The Form of the Active Voice
1412 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
1859 Views
03:20
Since vs For
1560 Views
04:50
Have or Has
1374 Views
00:49
Key Words: Present Perfect
3245 Views
09:03
The Use of the Present Perfect
1376 Views
03:08
Meaning and Form
1420 Views
02:40
Writing Formal Letters
1410 Views
03:10
Language Use
1997 Views
09:35
Parallel Structure
1568 Views
04:35
Prepositions of Instruments and Means
1380 Views
03:27
Polite Requests
1474 Views
06:30
May as a Modal of Permission and Request
1461 Views
04:11
Can as a Modal of Permission and Request
1272 Views
02:50
عناصر الاداء
1379 Views
03:45
شركة ستيرن
944 Views
01:15
مقياس القيمة المضافة
1234 Views
02:58
مقياس الربحية
1146 Views
02:39
معايير دركر
1305 Views
03:51
مقايس الاداء
1315 Views
01:41
اتخاذ اجراءات تصحيحية
1012 Views
01:52
المرحلة الثانية من الرقابة
992 Views
02:49
مراحل الرقابة
2346 Views