30:17
STRUCTURE
2705 Views
01:56
READING COMPREHENSION &VOCABULARY
1586 Views
01:52
The Form of Irregular Verbs
1594 Views
01:59
The Tense of the Passive Voice
1721 Views
09:31
Changing from Active into Passive
1448 Views
07:20
The Form of the Passive Voice
1677 Views
03:29
What is the Passive Voice?
1705 Views
03:45
The Form of the Active Voice
1668 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2270 Views
03:20
Since vs For
1778 Views
04:50
Have or Has
1596 Views
00:49
Key Words: Present Perfect
3620 Views
09:03
The Use of the Present Perfect
1654 Views
03:08
Meaning and Form
1716 Views
02:40
Writing Formal Letters
1687 Views
03:10
Language Use
2249 Views
09:35
Parallel Structure
1820 Views
04:35
Prepositions of Instruments and Means
1637 Views
03:27
Polite Requests
1706 Views
06:30
May as a Modal of Permission and Request
1830 Views
04:11
Can as a Modal of Permission and Request
1657 Views
02:50
عناصر الاداء
1556 Views
03:45
شركة ستيرن
1120 Views
01:15
مقياس القيمة المضافة
1363 Views
02:58
مقياس الربحية
1264 Views
02:39
معايير دركر
1476 Views
03:51
مقايس الاداء
1471 Views
01:41
اتخاذ اجراءات تصحيحية
1152 Views
01:52
المرحلة الثانية من الرقابة
1321 Views
02:49
مراحل الرقابة
2765 Views