30:17
STRUCTURE
2537 Views
01:56
READING COMPREHENSION &VOCABULARY
1435 Views
01:52
The Form of Irregular Verbs
1452 Views
01:59
The Tense of the Passive Voice
1550 Views
09:31
Changing from Active into Passive
1305 Views
07:20
The Form of the Passive Voice
1521 Views
03:29
What is the Passive Voice?
1555 Views
03:45
The Form of the Active Voice
1505 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
1993 Views
03:20
Since vs For
1649 Views
04:50
Have or Has
1467 Views
00:49
Key Words: Present Perfect
3362 Views
09:03
The Use of the Present Perfect
1472 Views
03:08
Meaning and Form
1525 Views
02:40
Writing Formal Letters
1510 Views
03:10
Language Use
2094 Views
09:35
Parallel Structure
1667 Views
04:35
Prepositions of Instruments and Means
1480 Views
03:27
Polite Requests
1573 Views
06:30
May as a Modal of Permission and Request
1579 Views
04:11
Can as a Modal of Permission and Request
1379 Views
02:50
عناصر الاداء
1422 Views
03:45
شركة ستيرن
990 Views
01:15
مقياس القيمة المضافة
1280 Views
02:58
مقياس الربحية
1173 Views
02:39
معايير دركر
1367 Views
03:51
مقايس الاداء
1337 Views
01:41
اتخاذ اجراءات تصحيحية
1035 Views
01:52
المرحلة الثانية من الرقابة
1105 Views
02:49
مراحل الرقابة
2450 Views