30:17
STRUCTURE
2646 Views
01:56
READING COMPREHENSION &VOCABULARY
1535 Views
01:52
The Form of Irregular Verbs
1531 Views
01:59
The Tense of the Passive Voice
1667 Views
09:31
Changing from Active into Passive
1394 Views
07:20
The Form of the Passive Voice
1617 Views
03:29
What is the Passive Voice?
1648 Views
03:45
The Form of the Active Voice
1612 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2181 Views
03:20
Since vs For
1724 Views
04:50
Have or Has
1548 Views
00:49
Key Words: Present Perfect
3501 Views
09:03
The Use of the Present Perfect
1586 Views
03:08
Meaning and Form
1644 Views
02:40
Writing Formal Letters
1622 Views
03:10
Language Use
2189 Views
09:35
Parallel Structure
1766 Views
04:35
Prepositions of Instruments and Means
1571 Views
03:27
Polite Requests
1651 Views
06:30
May as a Modal of Permission and Request
1748 Views
04:11
Can as a Modal of Permission and Request
1567 Views
02:50
عناصر الاداء
1489 Views
03:45
شركة ستيرن
1053 Views
01:15
مقياس القيمة المضافة
1329 Views
02:58
مقياس الربحية
1232 Views
02:39
معايير دركر
1432 Views
03:51
مقايس الاداء
1425 Views
01:41
اتخاذ اجراءات تصحيحية
1118 Views
01:52
المرحلة الثانية من الرقابة
1228 Views
02:49
مراحل الرقابة
2649 Views