30:17
STRUCTURE
2664 Views
01:56
READING COMPREHENSION &VOCABULARY
1554 Views
01:52
The Form of Irregular Verbs
1554 Views
01:59
The Tense of the Passive Voice
1684 Views
09:31
Changing from Active into Passive
1415 Views
07:20
The Form of the Passive Voice
1638 Views
03:29
What is the Passive Voice?
1668 Views
03:45
The Form of the Active Voice
1630 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2207 Views
03:20
Since vs For
1743 Views
04:50
Have or Has
1563 Views
00:49
Key Words: Present Perfect
3550 Views
09:03
The Use of the Present Perfect
1615 Views
03:08
Meaning and Form
1666 Views
02:40
Writing Formal Letters
1645 Views
03:10
Language Use
2212 Views
09:35
Parallel Structure
1789 Views
04:35
Prepositions of Instruments and Means
1595 Views
03:27
Polite Requests
1668 Views
06:30
May as a Modal of Permission and Request
1775 Views
04:11
Can as a Modal of Permission and Request
1599 Views
02:50
عناصر الاداء
1513 Views
03:45
شركة ستيرن
1076 Views
01:15
مقياس القيمة المضافة
1340 Views
02:58
مقياس الربحية
1243 Views
02:39
معايير دركر
1447 Views
03:51
مقايس الاداء
1440 Views
01:41
اتخاذ اجراءات تصحيحية
1131 Views
01:52
المرحلة الثانية من الرقابة
1261 Views
02:49
مراحل الرقابة
2698 Views