30:17
STRUCTURE
2587 Views
01:56
READING COMPREHENSION &VOCABULARY
1490 Views
01:52
The Form of Irregular Verbs
1495 Views
01:59
The Tense of the Passive Voice
1615 Views
09:31
Changing from Active into Passive
1353 Views
07:20
The Form of the Passive Voice
1577 Views
03:29
What is the Passive Voice?
1607 Views
03:45
The Form of the Active Voice
1557 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2085 Views
03:20
Since vs For
1685 Views
04:50
Have or Has
1512 Views
00:49
Key Words: Present Perfect
3435 Views
09:03
The Use of the Present Perfect
1531 Views
03:08
Meaning and Form
1585 Views
02:40
Writing Formal Letters
1567 Views
03:10
Language Use
2137 Views
09:35
Parallel Structure
1713 Views
04:35
Prepositions of Instruments and Means
1535 Views
03:27
Polite Requests
1615 Views
06:30
May as a Modal of Permission and Request
1691 Views
04:11
Can as a Modal of Permission and Request
1468 Views
02:50
عناصر الاداء
1459 Views
03:45
شركة ستيرن
1020 Views
01:15
مقياس القيمة المضافة
1303 Views
02:58
مقياس الربحية
1195 Views
02:39
معايير دركر
1406 Views
03:51
مقايس الاداء
1388 Views
01:41
اتخاذ اجراءات تصحيحية
1084 Views
01:52
المرحلة الثانية من الرقابة
1180 Views
02:49
مراحل الرقابة
2562 Views