30:17
STRUCTURE
2679 Views
01:56
READING COMPREHENSION &VOCABULARY
1565 Views
01:52
The Form of Irregular Verbs
1568 Views
01:59
The Tense of the Passive Voice
1700 Views
09:31
Changing from Active into Passive
1426 Views
07:20
The Form of the Passive Voice
1654 Views
03:29
What is the Passive Voice?
1680 Views
03:45
The Form of the Active Voice
1643 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2233 Views
03:20
Since vs For
1754 Views
04:50
Have or Has
1576 Views
00:49
Key Words: Present Perfect
3576 Views
09:03
The Use of the Present Perfect
1630 Views
03:08
Meaning and Form
1682 Views
02:40
Writing Formal Letters
1661 Views
03:10
Language Use
2226 Views
09:35
Parallel Structure
1804 Views
04:35
Prepositions of Instruments and Means
1606 Views
03:27
Polite Requests
1680 Views
06:30
May as a Modal of Permission and Request
1805 Views
04:11
Can as a Modal of Permission and Request
1617 Views
02:50
عناصر الاداء
1530 Views
03:45
شركة ستيرن
1093 Views
01:15
مقياس القيمة المضافة
1351 Views
02:58
مقياس الربحية
1253 Views
02:39
معايير دركر
1459 Views
03:51
مقايس الاداء
1459 Views
01:41
اتخاذ اجراءات تصحيحية
1138 Views
01:52
المرحلة الثانية من الرقابة
1280 Views
02:49
مراحل الرقابة
2726 Views