30:17
STRUCTURE
2460 Views
01:56
READING COMPREHENSION &VOCABULARY
1369 Views
01:52
The Form of Irregular Verbs
1387 Views
01:59
The Tense of the Passive Voice
1481 Views
09:31
Changing from Active into Passive
1239 Views
07:20
The Form of the Passive Voice
1450 Views
03:29
What is the Passive Voice?
1486 Views
03:45
The Form of the Active Voice
1439 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
1914 Views
03:20
Since vs For
1584 Views
04:50
Have or Has
1398 Views
00:49
Key Words: Present Perfect
3293 Views
09:03
The Use of the Present Perfect
1404 Views
03:08
Meaning and Form
1455 Views
02:40
Writing Formal Letters
1440 Views
03:10
Language Use
2026 Views
09:35
Parallel Structure
1598 Views
04:35
Prepositions of Instruments and Means
1413 Views
03:27
Polite Requests
1505 Views
06:30
May as a Modal of Permission and Request
1496 Views
04:11
Can as a Modal of Permission and Request
1305 Views
02:50
عناصر الاداء
1398 Views
03:45
شركة ستيرن
976 Views
01:15
مقياس القيمة المضافة
1264 Views
02:58
مقياس الربحية
1164 Views
02:39
معايير دركر
1326 Views
03:51
مقايس الاداء
1330 Views
01:41
اتخاذ اجراءات تصحيحية
1027 Views
01:52
المرحلة الثانية من الرقابة
1045 Views
02:49
مراحل الرقابة
2396 Views