30:17
STRUCTURE
2579 Views
01:56
READING COMPREHENSION &VOCABULARY
1478 Views
01:52
The Form of Irregular Verbs
1487 Views
01:59
The Tense of the Passive Voice
1605 Views
09:31
Changing from Active into Passive
1341 Views
07:20
The Form of the Passive Voice
1565 Views
03:29
What is the Passive Voice?
1596 Views
03:45
The Form of the Active Voice
1547 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2074 Views
03:20
Since vs For
1682 Views
04:50
Have or Has
1503 Views
00:49
Key Words: Present Perfect
3418 Views
09:03
The Use of the Present Perfect
1519 Views
03:08
Meaning and Form
1570 Views
02:40
Writing Formal Letters
1553 Views
03:10
Language Use
2130 Views
09:35
Parallel Structure
1706 Views
04:35
Prepositions of Instruments and Means
1527 Views
03:27
Polite Requests
1607 Views
06:30
May as a Modal of Permission and Request
1683 Views
04:11
Can as a Modal of Permission and Request
1452 Views
02:50
عناصر الاداء
1457 Views
03:45
شركة ستيرن
1016 Views
01:15
مقياس القيمة المضافة
1301 Views
02:58
مقياس الربحية
1192 Views
02:39
معايير دركر
1398 Views
03:51
مقايس الاداء
1381 Views
01:41
اتخاذ اجراءات تصحيحية
1074 Views
01:52
المرحلة الثانية من الرقابة
1170 Views
02:49
مراحل الرقابة
2552 Views