30:17
STRUCTURE
2683 Views
01:56
READING COMPREHENSION &VOCABULARY
1567 Views
01:52
The Form of Irregular Verbs
1574 Views
01:59
The Tense of the Passive Voice
1703 Views
09:31
Changing from Active into Passive
1431 Views
07:20
The Form of the Passive Voice
1657 Views
03:29
What is the Passive Voice?
1686 Views
03:45
The Form of the Active Voice
1648 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2243 Views
03:20
Since vs For
1759 Views
04:50
Have or Has
1583 Views
00:49
Key Words: Present Perfect
3586 Views
09:03
The Use of the Present Perfect
1638 Views
03:08
Meaning and Form
1689 Views
02:40
Writing Formal Letters
1667 Views
03:10
Language Use
2233 Views
09:35
Parallel Structure
1806 Views
04:35
Prepositions of Instruments and Means
1613 Views
03:27
Polite Requests
1687 Views
06:30
May as a Modal of Permission and Request
1811 Views
04:11
Can as a Modal of Permission and Request
1625 Views
02:50
عناصر الاداء
1534 Views
03:45
شركة ستيرن
1096 Views
01:15
مقياس القيمة المضافة
1352 Views
02:58
مقياس الربحية
1254 Views
02:39
معايير دركر
1460 Views
03:51
مقايس الاداء
1462 Views
01:41
اتخاذ اجراءات تصحيحية
1141 Views
01:52
المرحلة الثانية من الرقابة
1284 Views
02:49
مراحل الرقابة
2736 Views