30:17
STRUCTURE
2705 Views
01:56
READING COMPREHENSION &VOCABULARY
1587 Views
01:52
The Form of Irregular Verbs
1595 Views
01:59
The Tense of the Passive Voice
1722 Views
09:31
Changing from Active into Passive
1450 Views
07:20
The Form of the Passive Voice
1681 Views
03:29
What is the Passive Voice?
1706 Views
03:45
The Form of the Active Voice
1668 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2274 Views
03:20
Since vs For
1778 Views
04:50
Have or Has
1597 Views
00:49
Key Words: Present Perfect
3624 Views
09:03
The Use of the Present Perfect
1655 Views
03:08
Meaning and Form
1718 Views
02:40
Writing Formal Letters
1687 Views
03:10
Language Use
2250 Views
09:35
Parallel Structure
1820 Views
04:35
Prepositions of Instruments and Means
1641 Views
03:27
Polite Requests
1707 Views
06:30
May as a Modal of Permission and Request
1833 Views
04:11
Can as a Modal of Permission and Request
1661 Views
02:50
عناصر الاداء
1560 Views
03:45
شركة ستيرن
1122 Views
01:15
مقياس القيمة المضافة
1363 Views
02:58
مقياس الربحية
1265 Views
02:39
معايير دركر
1477 Views
03:51
مقايس الاداء
1472 Views
01:41
اتخاذ اجراءات تصحيحية
1153 Views
01:52
المرحلة الثانية من الرقابة
1326 Views
02:49
مراحل الرقابة
2770 Views