30:17
STRUCTURE
2656 Views
01:56
READING COMPREHENSION &VOCABULARY
1545 Views
01:52
The Form of Irregular Verbs
1547 Views
01:59
The Tense of the Passive Voice
1677 Views
09:31
Changing from Active into Passive
1407 Views
07:20
The Form of the Passive Voice
1630 Views
03:29
What is the Passive Voice?
1659 Views
03:45
The Form of the Active Voice
1626 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2200 Views
03:20
Since vs For
1737 Views
04:50
Have or Has
1559 Views
00:49
Key Words: Present Perfect
3538 Views
09:03
The Use of the Present Perfect
1608 Views
03:08
Meaning and Form
1661 Views
02:40
Writing Formal Letters
1638 Views
03:10
Language Use
2206 Views
09:35
Parallel Structure
1779 Views
04:35
Prepositions of Instruments and Means
1588 Views
03:27
Polite Requests
1663 Views
06:30
May as a Modal of Permission and Request
1771 Views
04:11
Can as a Modal of Permission and Request
1596 Views
02:50
عناصر الاداء
1507 Views
03:45
شركة ستيرن
1066 Views
01:15
مقياس القيمة المضافة
1335 Views
02:58
مقياس الربحية
1241 Views
02:39
معايير دركر
1444 Views
03:51
مقايس الاداء
1433 Views
01:41
اتخاذ اجراءات تصحيحية
1126 Views
01:52
المرحلة الثانية من الرقابة
1253 Views
02:49
مراحل الرقابة
2686 Views