30:17
STRUCTURE
2714 Views
01:56
READING COMPREHENSION &VOCABULARY
1592 Views
01:52
The Form of Irregular Verbs
1601 Views
01:59
The Tense of the Passive Voice
1729 Views
09:31
Changing from Active into Passive
1455 Views
07:20
The Form of the Passive Voice
1691 Views
03:29
What is the Passive Voice?
1716 Views
03:45
The Form of the Active Voice
1677 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2288 Views
03:20
Since vs For
1786 Views
04:50
Have or Has
1602 Views
00:49
Key Words: Present Perfect
3650 Views
09:03
The Use of the Present Perfect
1663 Views
03:08
Meaning and Form
1730 Views
02:40
Writing Formal Letters
1706 Views
03:10
Language Use
2258 Views
09:35
Parallel Structure
1829 Views
04:35
Prepositions of Instruments and Means
1654 Views
03:27
Polite Requests
1712 Views
06:30
May as a Modal of Permission and Request
1855 Views
04:11
Can as a Modal of Permission and Request
1683 Views
02:50
عناصر الاداء
1568 Views
03:45
شركة ستيرن
1130 Views
01:15
مقياس القيمة المضافة
1366 Views
02:58
مقياس الربحية
1269 Views
02:39
معايير دركر
1479 Views
03:51
مقايس الاداء
1478 Views
01:41
اتخاذ اجراءات تصحيحية
1157 Views
01:52
المرحلة الثانية من الرقابة
1333 Views
02:49
مراحل الرقابة
2782 Views