30:17
STRUCTURE
2688 Views
01:56
READING COMPREHENSION &VOCABULARY
1572 Views
01:52
The Form of Irregular Verbs
1577 Views
01:59
The Tense of the Passive Voice
1705 Views
09:31
Changing from Active into Passive
1434 Views
07:20
The Form of the Passive Voice
1662 Views
03:29
What is the Passive Voice?
1691 Views
03:45
The Form of the Active Voice
1651 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2249 Views
03:20
Since vs For
1761 Views
04:50
Have or Has
1585 Views
00:49
Key Words: Present Perfect
3589 Views
09:03
The Use of the Present Perfect
1640 Views
03:08
Meaning and Form
1694 Views
02:40
Writing Formal Letters
1670 Views
03:10
Language Use
2235 Views
09:35
Parallel Structure
1808 Views
04:35
Prepositions of Instruments and Means
1619 Views
03:27
Polite Requests
1689 Views
06:30
May as a Modal of Permission and Request
1815 Views
04:11
Can as a Modal of Permission and Request
1630 Views
02:50
عناصر الاداء
1539 Views
03:45
شركة ستيرن
1100 Views
01:15
مقياس القيمة المضافة
1352 Views
02:58
مقياس الربحية
1254 Views
02:39
معايير دركر
1462 Views
03:51
مقايس الاداء
1466 Views
01:41
اتخاذ اجراءات تصحيحية
1143 Views
01:52
المرحلة الثانية من الرقابة
1293 Views
02:49
مراحل الرقابة
2740 Views